Physician Profile
Frederick W. Penczak, MD
Unclaimed ProfileAbout Dr. Penczak
Frederick W. Penczak, MD practices surgery in San Rafael, CA. Frederick is a 1999 graduate of Medical College of Pennsylvania. According to Medicare claims data, Frederick cared for 271 Medicare patients across 275 services. The services billed most often include replacement of thigh bone and hip joint with prosthesis, replacement of knee joint, both sides of knee, and treatment of upper end of broken thigh bone with placement of stabilizing device or prosthetic replacement.
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
- (707) 939-7411
- Email not available
Practice Locations
78 CREEKSIDE DR
San Rafael, CA 94903
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
275 services · 271 patients · 4 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Replacement of thigh bone and hip joint with prosthesis | Procedure | 27130 |
128 | Too few peers to compare |
| Replacement of knee joint, both sides of knee | Procedure | 27447 |
99 | More than most peers in Surgery |
| Treatment of upper end of broken thigh bone with placement of stabilizing device or prosthetic replacement | Procedure | 27236 |
30 | Too few peers to compare |
| Treatment of broken neck of thigh bone with bone implant | Procedure | 27245 |
18 | Too few peers to compare |
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 in San Rafael 6
Same specialty, same city.
Trained at Medical College of Pennsylvania 8
Other providers in the same specialty who trained at the same institution.
Class of 1999 at Medical College of Pennsylvania 8
Providers who graduated from the same medical school in the same year.
More connections — 8 related providers in 1 group
Also performs Replacement of thigh bone and hip joint with prosthesis 8
Providers in CA who bill this service to Medicare most often.
Common questions
What does Dr. Penczak specialize in?
Dr. Penczak is a general surgeon in San Rafael, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Surgery”.
NPI registry
Where is Dr. Penczak located?
Dr. Penczak is listed at 78 Creekside Dr, San Rafael, CA 94903. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Penczak's phone number?
The number on file is (707) 939-7411. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Penczak's NPI number?
Dr. Penczak's National Provider Identifier is 1841379070. 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 Dr. Penczak go to medical school?
Dr. Penczak attended Medical College of Pennsylvania, graduating in 1999. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Penczak been practicing?
Dr. Penczak has 27 years experience. Calculated from a graduation year of 1999, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Penczak do most often?
According to Medicare billing data, Dr. Penczak performs procedures including replacement of thigh bone and hip joint with prosthesis, replacement of knee joint, both sides of knee and treatment of upper end of broken thigh bone with placement of stabilizing device or prosthetic replacement. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Penczak confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Penczak. 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.