Physician Profile
Unclaimed ProfileAbout OBRIEN
Douglas Obrien is a physician assistant based in Greenbrae, CA. Medicare claims data shows Douglas provided 7,088 services to 1,505 patients.
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
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (415) 925-7000
- Email not available
Practice Locations
250 BON AIR RD
Greenbrae, CA 94904
Procedures Most Often Billed to Medicare
7,088 services · 1,505 patients · 11 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Removal of muscle and/or tissue, 20.0 sq cm or less | Procedure | 11043 |
1,606 |
| Removal of bone, 20.0 sq cm or less | Procedure | 11044 |
617 |
| Removal of muscle and/or tissue, each additional 20.0 sq cm or less | Procedure | 11046 |
546 |
| Removal of bone, each additional 20.0 sq cm or less | Procedure | 11047 |
387 |
| Removal of skin and tissue, 20.0 sq cm or less | Procedure | 11042 |
68 |
| Application of chemical to stop tissue regrowth in wound | Procedure | 17250 |
27 |
| Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes | Office visit | 99310 |
2,001 |
| Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes | Office visit | 99309 |
1,177 |
| Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more | Office visit | 99308 |
391 |
| Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes | Office visit | 99305 |
192 |
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 physician assistants 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 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 — 31 related providers in 4 groups
Other physician assistants in Greenbrae 7
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 1994 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Removal of muscle and/or tissue, 20.0 sq cm or less 8
Providers in CA who bill this service to Medicare most often.
Common questions
What is Dr. Obrien's specialty?
Dr. Obrien is a physician assistant in Greenbrae, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “PHYSICIAN ASSISTANT”.
NPI registry
Where can I find Dr. Obrien?
Dr. Obrien is listed at 250 BON AIR RD, Greenbrae, CA 94904. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Obrien?
The number on file is (415) 925-7000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Obrien?
Dr. Obrien's National Provider Identifier is 1235158239. 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. Obrien's medical education?
Dr. Obrien attended Other, graduating in 1994. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Obrien have?
Dr. Obrien has 32 years experience. Calculated from a graduation year of 1994, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Obrien known for?
According to Medicare billing data, Dr. Obrien performs procedures including removal of muscle and/or tissue, 20.0 sq cm or less, removal of bone, 20.0 sq cm or less and removal of muscle and/or tissue, each additional 20.0 sq cm or less, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Obrien's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Obrien. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.