Physician Profile
John L. Zapas, M.D.
Unclaimed ProfileAbout Dr. Zapas
John L. Zapas, M.D. practices surgery in Frederick, MD. John is a 1991 graduate of University of Maryland School of Medicine. According to Medicare claims data, John cared for 281 Medicare patients across 288 services. The services billed most often include new patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more, new patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more, and established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (301) 663-9573
- Email not available
Practice Locations
501 W 7TH ST
Frederick, MD 21701
7211 Bank Ct Suite 200
Frederick, MD 21703
424 Savannah Rd
Lewes, DE 19958
19161 Healthy Way
Rehoboth Beach, DE 19971
18941 John J Williams Hwy
Rehoboth Beach, DE 19971
33672 Bayview Medical Dr Fl 1
Lewes, DE 19958
Conditions Commonly Evaluated or Treated
Within Surgery (Unspecified) generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Appendicitis
- Breast cancer
- Gallstones
- Hernia
- Thyroid nodules
Breast conditions
- Benign breast disease
- Gynecomastia
Cancer
- Colon cancer
- Esophageal cancer
- Liver cancer
- Neuroendocrine Tumors
- Pancreatic cancer
- Soft-tissue sarcoma
- Stomach cancer
- Thyroid cancer
Colorectal
- Anal fissure
- Anal fistula
- Hemorrhoids
- Lower gastrointestinal bleeding
- Rectal prolapse
Digestive
- Abdominal adhesions
- Acid reflux
- Acute pancreatitis
- Bowel obstruction
- Colon polyps
- Diverticulitis
- Gastroparesis
- Peptic ulcer disease
Digestive & blood
- Enlarged spleen
Digestive health
- Crohn's disease
- Fecal incontinence
- Perforated bowel
- Severe chronic constipation
- Swallowing difficulties
- Ulcerative colitis
Endocrine
- Adrenal gland tumor
- Goiter
- Hyperparathyroidism
Infections
- Gangrene
- Skin and soft-tissue abscess
Lumps & bumps
- Ganglion Cyst In Hand Or Wrist
Lymphatic
- Lymphedema
- Swollen Lymph Nodes
Minor surgery
- Ingrown toenail
Skin & scars
- Keloids and hypertrophic scars
Skin & soft tissue
- Epidermoid cyst
- Lipoma
- Pilonidal cyst
- Skin lump or bump
Skin cancer
- Moles and atypical moles
- Skin cancer
Vascular
- Carotid Artery Blockage
- Deep vein thrombosis
- Peripheral artery disease
- Varicose veins
Weight & metabolism
- Obesity
Wound care
- Bedsores
- Post-surgery fever or infection
Wounds
- Diabetic foot ulcer
Procedures & services
Most searched procedures
- Appendectomy
- Breast biopsy
- Gallbladder surgery
- Hernia repair surgery
- Lumpectomy
Abdominal
- Gynecologic laparoscopy
- Spleen removal
Abdominal surgery
- Small-bowel resection
- Stomach removal surgery
Bariatric
- Lap band removal
- Weight loss surgery revision
Breast surgery
- Male Breast Reduction
Cancer
- Mastectomy
- Sentinel lymph-node biopsy
- Whipple procedure
Cancer surgery
- Esophagus removal surgery
- Liver tumor removal
Colorectal
- Anal fistula surgery
- Anal Sphincter Repair
- Colon resection
- Hemorrhoid removal
- Ostomy reversal
- Ostomy surgery
- Rectal prolapse repair
- Surgery for chronic anal fissure
Consultations
- Pre-Op Clearance Exam
- Robotic surgery consultation
Diagnostic
- Colonoscopy
- Skin lump biopsy
Digestive
- Acid reflux surgery
- Feeding tube placement
Digestive health
- Endoscopy
- Peroral endoscopic myotomy
Endocrine
- Adrenal gland removal
- Parathyroid surgery
- Thyroid removal surgery
Infections
- Incision and drainage of an abscess
Minor surgery
- Fishhook or embedded splinter removal
- Ingrown toenail removal
Post-op care
- Suture removal
Reconstruction
- Skin graft
Skin & soft tissue
- Cyst Removal
- Lipoma removal
- Mole removal
- Pilonidal cyst surgery
- Scar revision surgery
- Skin Tag Removal
Skin cancer
- Excision of skin cancer
Vascular
- Blood Clot Removal Surgery
- Carotid endarterectomy
- Leg bypass surgery
- Varicose vein removal
Vascular & cancer
- Chemo port placement
- Chemo port removal
Weight loss
- Gastric bypass surgery
- Gastric sleeve surgery
Wound care
- Bed sore surgery
- Negative pressure wound therapy
Wounds
- Wound Debridement For Foot Ulcer
Procedures Most Often Billed to Medicare
288 services · 281 patients · 9 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Repair of groin hernia using an endoscope | Procedure | 49650 |
33 | More than most peers in Surgery |
| Insertion of central venous tube with port (5 years or older) | Procedure | 36561 |
22 | More often than most peers in Surgery |
| Removal of gallbladder with x-ray study of bile ducts using an endoscope | Procedure | 47563 |
16 | As often as other peers in Surgery |
| Fluoroscopic guidance for insertion or removal of central vein access device | Imaging | 77001 |
21 | More often than most peers in Surgery |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
60 | More often than most peers in Surgery |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
56 | More often than most peers in Surgery |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
37 | As often as other peers in Surgery |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
25 | As often as other peers in Surgery |
| Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more | Office visit | 99212 |
18 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other general surgeons at this location 1
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other general surgeons in Frederick 7
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at University of Maryland School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1991 at University of Maryland School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Repair of groin hernia using an endoscope 8
Providers in MD who bill this service to Medicare most often.
Common questions
What does John L. Zapas specialize in?
John L. Zapas is a general surgeon in Frederick, MD. That is the designation recorded for this NPI in the federal registry, where it is listed as “Surgery”.
NPI registry
Where is John L. Zapas located?
John L. Zapas is listed at 501 W 7Th St, Frederick, MD 21701. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is John L. Zapas's phone number?
The number on file is (301) 663-9573. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is John L. Zapas's NPI number?
John L. Zapas's National Provider Identifier is 1487613022. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did John L. Zapas train?
John L. Zapas attended University of Maryland School of Medicine, graduating in 1991. This comes from the CMS National Downloadable File.
CMS public data
How long has John L. Zapas been practicing?
John L. Zapas has 35 years experience. Calculated from a graduation year of 1991, reported in the CMS National Downloadable File.
CMS public data
What does John L. Zapas do most often?
According to Medicare billing data, John L. Zapas performs procedures including repair of groin hernia using an endoscope, insertion of central venous tube with port and removal of gallbladder with x-ray study of bile ducts using an endoscope; reads or performs imaging such as fluoroscopic guidance for insertion or removal of central vein access device, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has John L. Zapas confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by John L. Zapas. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.