Carol R. Schaffer, M.D.
Hospitalist Physician · Concord, CA
Carol R. Schaffer, M.D. is a hospitalist physician with a practice address in Concord, California, and NPI 1871513226, issued on Jul 20, 2006. Check the license (California A55823, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Carol R. Schaffer
- Credential
- M.D.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- A55823 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2700 Grant St, Concord, CA 94520
- Phone
- (925) 674-2609
- Enumerated
- Jul 20, 2006
- Record last updated
- Jun 21, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (925) 674-2211
- Medicaid ID
- 00A558230 CA
- Medicare enrollment
- Enrolled (PECOS I20150113002358); accepts Medicare assignment
- Medical or professional school
- University Of Rochester School Of Medicine And Dentistry, 1994
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 2700 Grant St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Kris Arneson, P.T.Physical Therapist1669596425
- Alicia Bakkum, NPClinical Nurse Specialist1982793220
- Mike Bannout, M.D.Internal Medicine Physician1598784662
Verify Carol R. Schaffer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A55823Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 85.7 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
- John Muir Physician NetworkConcord, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Carol R. Schaffer among 3,099 hospitalist physician records in California
Carol R. Schaffer, M.D. is one of 3,099 hospitalist physician records with a practice address in California. 90% 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 2% of them.
- NPI issued2006 · 2% of these records are older, 73% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated1994 · median 2010 among the 2,505 with a school on file
- Record last updated2012 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in California
There are 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in Concord → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- John Chartier, M.D.Concord, CA 945201659390649
- Sweta Ghodasara, M.D.Concord, CA 945201851520225
- Kari Grabowsky, M.D.Concord, CA 945201578530218
- Eric Hoenig, M.D.Concord, CA 945201003939422
- Shamroze KhanConcord, CA 945201376936856
- Kristin Leonard, DOConcord, CA 945201790195089
- Thomas Nguyen, M.D.Concord, CA 945201669807699
- Jennifer O'Neill-Cha, M.D.Concord, CA 945201033479936
Common questions
What is Carol R. Schaffer, M.D.'s NPI number?
Carol R. Schaffer, M.D.'s National Provider Identifier (NPI) is 1871513226, issued on Jul 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Carol R. Schaffer, M.D. located?
The NPPES record lists a practice address at 2700 Grant St, Concord, CA, 94520. Phone: (925) 674-2609. Providers update this record themselves, so call before visiting.
How can I verify Carol R. Schaffer, M.D.'s license?
NPPES lists California license number A55823, 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.
What is Carol R. Schaffer, M.D.'s MIPS final score?
The 2023 MIPS final score is 85.7 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.