Dr. John Olson
- Gender: Male
- Experience: 29 years
- Graduated from: University Of Florida College Of Medicine
- Graduation year: 1992
- Sole propriator: No
- NPI: 1649370750
Dr. John Olson JR. MD PHD
Oncological Surgeon
He is located at 22 South Greene Street in Baltimore, MD 21201. Can help patients with the following: Crohn's Disease, Gallbladder Cancer, Inflammatory Bowel Disease (IBD), Peptic Ulcer, Thyroid Cancer, Ulcerative Colitis. His National Provider Identifier (NPI) number is 1649370750. Appointment can be made via the phone number (410) 328-6187. He is affiliated with 3 practices and 3 hospitals.
Conditions treated
Dr. John Ackerman Olson, being an oncological surgeon, treats the following conditions. Please be advised that this list may not be complete. For the full list of conditions treated, consult directly with Dr. John Olson.
- Achalasia
- Anal Fissure
- Appendicitis
- Bile Duct Cancer
- Boils
- Breast Cancer
- Cancer
- Carcinoid Tumor
- Colon Cancer
- Crohn's Disease
- Cyst
- Diverticulosis
- Enlarged Spleen
- Esophageal Cancer
- Gallbladder Cancer
- Gallstones
- Gangrene
- Heart Disease
- Hemorrhoids
- Hernia
- Inflammatory Bowel Disease (IBD)
- Lymphedema
- Melanoma
- Non-Hodgkin's Lymphoma (NHL)
- Pancreatic Cancer
- Pancreatitis
- Peptic Ulcer
- Pheochromocytoma (PCC)
- Pilonidal Cyst
- Sebaceous Cyst
- Skin Cancer
- Thyroid Cancer
- Ulcerative Colitis
Procedures Performed by Dr. John Olson
ACA Marketplace (Obamacare/HealthCare.gov) plan networks
Insurers selling ACA Marketplace (HealthCare.gov) plans list Dr. John Olson as in-network for the following 2026 plans.
Health plans
Cox HealthPlans
Network data as of Sep 11, 2026, as reported by the insurer.
Show all 7 plans from Cox HealthPlans
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Cox HealthPlans Bronze Expanded Standard | EPO · Expanded Bronze | EPO | Accepting new patients |
| Cox HealthPlans Bronze Preferred | EPO · Bronze | EPO | Accepting new patients |
| Cox HealthPlans Gold Preferred | EPO · Gold | EPO | Accepting new patients |
| Cox HealthPlans Gold Standard | EPO · Gold | EPO | Accepting new patients |
| Cox HealthPlans Silver Connect | EPO · Silver | EPO | Accepting new patients |
| Cox HealthPlans Silver Preferred | EPO · Silver | EPO | Accepting new patients |
| Cox HealthPlans Silver Standard | EPO · Silver | EPO | Accepting new patients |
UnitedHealthcare
Network data as of Sep 15, 2026, as reported by the insurer.
Show all 13 plans from UnitedHealthcare
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| UHC Bronze Copay Focus $0 Indiv Med Ded ($0 Virtual Urgent Care, No Referrals) | EPO · Expanded Bronze | Non Preferred | Accepting new patients |
| UHC Bronze Essential (No Referrals) | EPO · Bronze | Non Preferred | Accepting new patients |
| UHC Bronze Standard (No Referrals) | EPO · Expanded Bronze | Non Preferred | Accepting new patients |
| UHC Bronze Standard+ (Dental + Vision, No Referrals) | EPO · Expanded Bronze | Non Preferred | Accepting new patients |
| UHC Gold Advantage ($0 Virtual Urgent Care, No Referrals) | EPO · Gold | Non Preferred | Accepting new patients |
| UHC Gold Advantage+ ($0 Virtual Urgent Care, Dental + Vision, No Referrals) | EPO · Gold | Non Preferred | Accepting new patients |
| UHC Gold Copay Focus $0 Indiv Med Ded ($0 Virtual Urgent Care, $8 Tier 2 Rx, No Referrals) | EPO · Gold | Non Preferred | Accepting new patients |
| UHC Gold Standard (No Referrals) | EPO · Gold | Non Preferred | Accepting new patients |
| UHC Silver Advantage ($0 Virtual Urgent Care, No Referrals) | EPO · Silver | Non Preferred | Accepting new patients |
| UHC Silver Advantage+ ($0 Virtual Urgent Care, Dental + Vision, No Referrals) | EPO · Silver | Non Preferred | Accepting new patients |
| UHC Silver Copay Focus $0 Indiv Med Ded ($0 Virtual Urgent Care, No Referrals) | EPO · Silver | Non Preferred | Accepting new patients |
| UHC Silver Standard (No Referrals) | EPO · Silver | Non Preferred | Accepting new patients |
| UHC Silver Standard+ (Dental + Vision, No Referrals) | EPO · Silver | Non Preferred | Accepting new patients |
This covers ACA Marketplace plans only, as reported by each insurer. It does not include employer, Medicare Advantage, or state-run exchange plans, and a plan missing from this list does not mean Dr. John Olson is out of network. Insurer directories can be out of date, so always confirm with the insurer and the office before your visit.
Medicare Enrollment
Dr. John Olson is enrolled to bill Medicare as a Practitioner - Surgical Oncology (also registered under: Practitioner - General Surgery) .
Bills through: Washington University
Based on Medicare's public enrollment records as of Jul 17, 2026. This reflects Medicare fee-for-service enrollment only and says nothing about other insurance, quality, outcomes, or board certification.
Payments received
Drug payment
| Intuitive Surgical | $544 |
Other
| Travel and Lodging | $362 |
| Food and Beverage | $183 |
Studies
UNIVERSITY OF FLORIDA COLLEGE OF MEDICINE
Graduated in 1992Additional Specialities
- Surgeon
Affiliated practices
Affiliated hospitals
Looking for more Oncological Surgeons?
Out of the 14 oncological surgeons in this region, here are 10 randomly selected ones for you to explore.
- Gender: Female
- Address: 2799 West Grand Boulevard Detroit, 48202, MI
- Gender: Female
- Address: Div Surg Plastics, Ste 6G 4921 Parkview Place Saint Louis, 63110, MO
- Gender: Male
- Address: Div Surg Oncology, Ste 5B 4921 Parkview Place Saint Louis, 63110, MO
- Gender: Male
- Address: Div Surg Oncology, Ste 5F 4921 Parkview Place Saint Louis, 63110, MO
- Gender: Male
- Address: Div Surg Transplant, Ste 12B 4921 Parkview Place Saint Louis, 63110, MO
- Gender: Female
- Address: Washington University /Surgery Oncology 660 South Euclid Avenue Saint Louis, 63110, MO
- Gender: Male
- Address: 660 South Euclid Avenue Saint Louis, 63110, MO
- Gender: Female
- Address: Div Surg Transplant, Ste 12B 4921 Parkview Place Saint Louis, 63110, MO
- Gender: Male
- Address: 3655 Vista Avenue Saint Louis, 63110, MO
- Gender: Female
- Address: 1011 Bowles Avenue Suite G10 Fenton, 63026, MO
Questions & Answers
Where can you meet with Dr. John Ackerman Olson?
Dr. John Ackerman Olson's office is located at 22 South Greene Street in Baltimore, MD 21201.
Has Dr. John Ackerman Olson affiliation with hospitals?
Dr. John Ackerman Olson is affiliated with UNIVERSITY OF MARYLAND ST JOSEPH MEDICAL CENTER. For the full list of hospitals see this list.
What conditions does Dr. John Ackerman Olson treat?
Dr. John Ackerman Olson provides treatment for Crohn's Disease, Gallbladder Cancer, Inflammatory Bowel Disease (IBD), Peptic Ulcer, Thyroid Cancer, Ulcerative Colitis. For the full list see this list.
Does Dr. John Ackerman Olson accept patients with UnitedHealthcare?
Yes, Dr. John Ackerman Olson is listed in-network for UnitedHealthcare through the ACA Marketplace (Obamacare/HealthCare.gov). See the Marketplace plans section for details.
Does Dr. John Ackerman Olson have affiliation with practices?
Dr. John Ackerman Olson is affiliated with UM Shore Medical Center at Easton. For the full list of practices see this list.