Physician Profile
Chelsea J. Thomsen, M.D., M.S.P.H
Unclaimed ProfileAbout Dr. Thomsen
Chelsea J. Thomsen, M.D., M.S.P.H practices internal medicine in San Francisco, CA. Chelsea is a 2014 graduate of University of Arizona College of Medicine. Medicare claims data shows Chelsea provided 191 services to 119 patients. The services billed most often include established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, and insertion of needle into vein for collection of blood sample. The provider's National Provider Identifier (NPI) is 1003227927.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
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
- (415) 291-0480
- Email not available
Practice Locations
2 W PORTAL AVE
San Francisco, CA 94127
1998 Market St
San Francisco, CA 94102
Conditions Commonly Evaluated or Treated
Within Internal Medicine 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
- Allergies
- Diabetes
- Flu
- Hypothyroidism
- Strep throat
- UTI
Cardiometabolic
Digestive and liver
Endocrine, blood, and bone
Infectious disease
Kidney and urinary
Respiratory
Blood & Circulation
Blood disorders
Brain & Nerves
Brain and nerves
Cardiac and vascular
Digestive
Heart & Circulation
Infections
Kidney & Bladder
Lungs & Breathing
Mental Health
Neurologic and behavioral
Pain
Rheumatologic and pain
Procedures & services
Most searched procedures
- Annual physical
- Blood test
- Flu shot
- Medicare wellness visit
- Sick visit
- TB test
- Well-woman exam
Preventive and evaluation
- Medication management
- Post-hospital transitional care
Screening and diagnostic testing
Bones & Joints
Brain and nerves
Cancer screening
- Colon Cancer Screening Referral
- Mammogram Referral
Digestive
Exams & Consultations
Heart & Circulation
Heart health
- Cardiac Stress Test Referral
Imaging referral
- Abdominal Ultrasound Referral
Immunizations
Lab tests
Lungs & Breathing
- At-Home Sleep Study Order
Metabolic & Weight
- Weight Loss Injections and Medication
Minor procedures
Office procedures
Office Procedures
- Skin Tag and Mole Removal
- Vitamin B12 Injections
- Wart Removal
Pain management
Preventive & Routine Care
Screenings & Diagnostics
Sexual health
Procedures Most Often Billed to Medicare
191 services · 119 patients · 5 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
48 | Less often than most peers in Internal Medicine |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
62 | As often as other peers in Internal Medicine |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
51 | Less often than most peers in Internal Medicine |
| Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient' | Billing code | G2211 |
18 | Less often than most peers in Internal Medicine |
| Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | Billing code | G0439 |
12 | Less often than most peers in Internal Medicine |
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 internists at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 4
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 2
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 32 related providers in 4 groups
Other internists in San Francisco 8
Same specialty, same city.
Trained at University of Arizona College of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2014 at University of Arizona College of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Insertion of needle into vein for collection of blood sample 8
Providers in CA who bill this service to Medicare most often.
Common questions
What is Chelsea J. Thomsen, M.D.'s specialty?
Chelsea J. Thomsen, M.D. is an internist in San Francisco, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Internal Medicine”.
NPI registry
Where can I find Chelsea J. Thomsen, M.D.?
Chelsea J. Thomsen, M.D. is listed at 2 W Portal Ave, San Francisco, CA 94127. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Chelsea J. Thomsen, M.D.?
The number on file is (415) 291-0480. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Chelsea J. Thomsen, M.D.?
Chelsea J. Thomsen, M.D.'s National Provider Identifier is 1003227927. 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 Chelsea J. Thomsen, M.D.'s education?
Chelsea J. Thomsen, M.D. attended University of Arizona College of Medicine, graduating in 2014. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Chelsea J. Thomsen, M.D. have?
Chelsea J. Thomsen, M.D. has 12 years experience. Calculated from a graduation year of 2014, reported in the CMS National Downloadable File.
CMS public data
What is Chelsea J. Thomsen, M.D. known for?
According to Medicare billing data, Chelsea J. Thomsen, M.D. performs procedures including insertion of needle into vein for collection of blood sample, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Chelsea J. Thomsen, M.D.'s profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Chelsea J. Thomsen, M.D.. If this is you, claiming it is free.
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