Physician Profile
John D. Oholleran, MD
Unclaimed ProfileAbout Dr. Oholleran
Based in Oregon City, OR, John D. Oholleran, MD is listed in the NPI registry under surgery. John graduated from University of Nebraska College of Medicine in 1987. According to Medicare claims data, John cared for 28 Medicare patients across 43 services. The services billed most often include subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes and initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes.
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
Source: NPPES NPI Registry
Contact Information
- (503) 723-6525
- Email not available
Practice Locations
1510 DIVISION ST STE 210
Oregon City, OR 97045
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
43 services · 28 patients · 2 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
27 |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
16 |
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 7
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 1
Clinically related specialties at the same address — the people this provider most likely works alongside.
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.
More connections — 17 related providers in 3 groups
Trained at University of Nebraska College of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1987 at University of Nebraska College of Medicine 8
Providers who graduated from the same medical school in the same year.
Common questions
What is Dr. Oholleran's specialty?
Dr. Oholleran is a general surgeon in Oregon City, OR. That is the designation recorded for this NPI in the federal registry, where it is listed as “Surgery”.
NPI registry
Where can I find Dr. Oholleran?
Dr. Oholleran is listed at 1510 Division St Ste 210, Oregon City, OR 97045. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Oholleran?
The number on file is (503) 723-6525. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Oholleran's NPI number?
Dr. Oholleran's National Provider Identifier is 1912007220. 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
What is Dr. Oholleran's medical education?
Dr. Oholleran attended University of Nebraska College of Medicine, graduating in 1987. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Oholleran been practicing?
Dr. Oholleran has 39 years experience. Calculated from a graduation year of 1987, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Oholleran known for?
According to Medicare billing data, Dr. Oholleran the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Oholleran confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Oholleran. 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.