Stephanie Claudia Greger, M.D.
Rheumatology Physician · Ventura, CA
Stephanie Claudia Greger, M.D. is a rheumatology physician with a practice address in Ventura, California, and NPI 1912138132, issued on Aug 5, 2009. Check the license (California A102891, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Stephanie Claudia Greger
- Credential
- M.D.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License numbers
- A102891 CA
245362 MA
Self-reported in NPPES; status is on the state search - Practice location
- 3291 Loma Vista RD Bldg 340, Ventura, CA 93003
- Phone
- (805) 652-6222
- Enumerated
- Aug 5, 2009
- Record last updated
- May 28, 2026
- Fax
- (805) 652-6221
- Medicare enrollment
- Enrolled (PECOS I20131230001590); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 2004
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 926 in California → Look up another NPI →
Also registered at 3291 Loma Vista RD Bldg 340
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Thomas Lee, MDOphthalmology Physician1275620353
- Juan Vega, M.D.Obstetrics & Gynecology Physician1194889170
Verify Stephanie Claudia Greger in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A102891Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
41% fewer Medicare Part D claims than the average rheumatology physician in 2024
1,176 Medicare Part D claims for 136 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D.
Most prescribed
- Methotrexate161 claims
- Prednisone123 claims
- Enbrel Sureclick93 claims
- Leflunomide92 claims
- Hydroxychloroquine Sulfate54 claims
- Enbrel52 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 practice group's MIPS final score for 2023 (Medicare payment program): 87.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- County OF VenturaVentura, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stephanie Claudia Greger among 926 rheumatology physician records in California
Stephanie Claudia Greger, M.D. is one of 926 rheumatology physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 63% of them.
- NPI issued2009 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2004 · median 2003 among the 641 with a school on file
- Record last updated2026 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in California
There are 926 rheumatology physician records in California.
All 926 in California → Every provider in Ventura → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Hooman Dehghan, MDVentura, CA 930031801109038
- Robert Gonzalez, M.D.Ventura, CA 930031790849230
- Artem MinalyanVentura, CA 930031417481045
- Alan Peter, M.D.Ventura, CA 930031881690089
- Tammy Sievers, MDVentura, CA 930031619004694
- Travis Welsh, MDVentura, CA 930031821591611
- Gita Fatemi, M.D.Camarillo, CA 930101154601524
- Howard Hoos, MDOxnard, CA 930301114939287
Common questions
What is Stephanie Claudia Greger, M.D.'s NPI number?
Stephanie Claudia Greger, M.D.'s National Provider Identifier (NPI) is 1912138132, issued on Aug 5, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Stephanie Claudia Greger, M.D. located?
The NPPES record lists a practice address at 3291 Loma Vista RD Bldg 340, Ventura, CA, 93003. Phone: (805) 652-6222. Providers update this record themselves, so call before visiting.
How can I verify Stephanie Claudia Greger, M.D.'s license?
NPPES lists California license number A102891, 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 Stephanie Claudia Greger, M.D. prescribe under Medicare Part D?
In 2024, Stephanie Claudia Greger, M.D. had 1,176 Medicare Part D claims for 136 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
What is Stephanie Claudia Greger, M.D.'s MIPS final score?
The 2023 MIPS final score is 87.2 of 100, reported for the practice group. 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.