Karen Ross Tammela, MD
Obstetrics & Gynecology Physician · Santa Maria, CA
Karen Ross Tammela, MD is an obstetrics & gynecology physician with a practice address in Santa Maria, California, and NPI 1396770905, issued on Jul 11, 2006. Check the license (California C153083, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Karen Ross Tammela
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License numbers
- C153083 CA
48141 WI
Self-reported in NPPES; status is on the state search - Practice location
- 220 S Palisade Dr Ste 203, Santa Maria, CA 93454
- Phone
- (805) 354-7101
- Enumerated
- Jul 11, 2006
- Record last updated
- Nov 8, 2023
- Fax
- (805) 354-7102
- Medicaid ID
- 34648200 WI
- Medicare enrollment
- Enrolled (PECOS I20181127002770); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 220 S Palisade Dr Ste 203
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mona Bazargan, D.O.Obstetrics & Gynecology Physician1437502499
- Taimur Chaudhry, MDObstetrics & Gynecology Physician1043355910
- Xinyue Chen, DOObstetrics & Gynecology Physician1356920557
- Aimee De Guzman, CNMAdvanced Practice Midwife1093512378
- Deena Elwan, M.D.Obstetrics & Gynecology Physician1588190227
- Jennifer GravesFamily Nurse Practitioner1639682057
Verify Karen Ross Tammela in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C153083Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
18 Medicare Part D claims, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 96.5 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Pacific Central Coast Health CentersSanta Maria, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karen Ross Tammela among 5,088 obstetrics & gynecology physician records in California
Karen Ross Tammela, MD is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 52% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1997 · median 2004 among the 2,700 with a school on file
- Record last updated2023 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
39 obstetrics & gynecology physician records list a practice address in Santa Maria
They are 39 of the 3,047 NPPES records with a practice address in Santa Maria, and 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in Santa Maria → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Ilona Baran, MDSanta Maria, CA 934541487639290
- Tad Callahan, MDSanta Maria, CA 934541225112931
- Brian Crisp, M.D.Santa Maria, CA 934541861446262
- Keith Dillon, M.D.Santa Maria, CA 934541154407534
- Kenneth Fogelberg, M.D.Santa Maria, CA 934541801897764
- Carolyn Griffith, M.D.Santa Maria, CA 934541720009269
- Rebecca Jones, M.D.Santa Maria, CA 934541093823700
- Robert McGhie, M.D.Santa Maria, CA 934541730184367
Common questions
What is Karen Ross Tammela, MD's NPI number?
Karen Ross Tammela, MD's National Provider Identifier (NPI) is 1396770905, issued on Jul 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karen Ross Tammela, MD located?
The NPPES record lists a practice address at 220 S Palisade Dr Ste 203, Santa Maria, CA, 93454. Phone: (805) 354-7101. Providers update this record themselves, so call before visiting.
How can I verify Karen Ross Tammela, MD's license?
NPPES lists California license number C153083, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Karen Ross Tammela, MD prescribe under Medicare Part D?
In 2024, Karen Ross Tammela, MD had 18 Medicare Part D claims; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
What is Karen Ross Tammela, MD's MIPS final score?
The 2023 MIPS final score is 96.5 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.