Physician Profile
Karen Callen, M.D.
Unclaimed ProfileAbout Dr. Callen
Karen Callen, M.D. is a specialist based in San Francisco, CA. Karen is a 1984 graduate of Tulane University School of Medicine. Karen is also listed as specializing in obstetrics & gynecology. Medicare claims data shows Karen provided 107 services to 105 patients. The services billed most often include cervical or vaginal cancer screening; pelvic and clinical breast examination, established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, and screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
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
- (415) 831-2180
- Email not available
Practice Locations
1725 MONTGOMERY ST SUITE 200
San Francisco, CA 94111
Procedures Most Often Billed to Medicare
107 services · 105 patients · 3 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Cervical or vaginal cancer screening; pelvic and clinical breast examination | Billing code | G0101 |
72 | More often than most peers in Specialist |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
22 | Less often than most peers in Specialist |
| Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory | Billing code | Q0091 |
13 | Less often than most peers in Specialist |
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 specialists at this location 2
Same specialty, same street address — most likely the same department or group.
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.
Other specialists in San Francisco 8
Same specialty, same city.
More connections — 16 related providers in 2 groups
Trained at Tulane University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1984 at Tulane University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Common questions
What is Karen Callen's specialty?
Karen Callen is a specialist in San Francisco, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where can I find Karen Callen?
Karen Callen is listed at 1725 Montgomery St Suite 200, San Francisco, CA 94111. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Karen Callen?
The number on file is (415) 831-2180. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Karen Callen?
Karen Callen's National Provider Identifier is 1952459349. 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 Karen Callen's education?
Karen Callen attended Tulane University School of Medicine, graduating in 1984. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Karen Callen have?
Karen Callen has 42 years experience. Calculated from a graduation year of 1984, reported in the CMS National Downloadable File.
CMS public data
What is Karen Callen known for?
According to Medicare billing data, Karen Callen 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
Is Karen Callen's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Karen Callen. 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.