Charlene B. Spencer, M.D.
Hospitalist Physician · Walnut Creek, CA
Charlene B. Spencer, M.D. is a hospitalist physician with a practice address in Walnut Creek, California, and NPI 1821037367, issued on Jun 6, 2006. Check the license (California G83176, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Charlene B. Spencer
- Credential
- M.D.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- G83176 CA
Self-reported in NPPES; status is on the state search - Practice location
- 801 Ygnacio Valley RD, Walnut Creek, CA 94596
- Phone
- (925) 946-1080
- Enumerated
- Jun 6, 2006
- Record last updated
- Jul 13, 2026
- Fax
- (925) 946-9717
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 801 Ygnacio Valley RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Douglas Boakye, DOHospitalist Physician1407974249
- Kurukulasooriya Fernando, MDHospitalist Physician1255459756
- Niceto Lopez, MDHospitalist Physician1003012931
- Mahsa Modarres Sabzevari, MSPTOrthopedic Physical Therapist1689784944
- Peter Rowe, M.D.Hospitalist Physician1700831922
Verify Charlene B. Spencer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G83176Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.2 times the Medicare Part D claims of the average hospitalist physician in 2024
1,136 Medicare Part D claims for 48 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 34 claims were for opioids.
Most prescribed
- Gabapentin121 claims
- Levothyroxine Sodium89 claims
- Escitalopram Oxalate58 claims
- Memantine Hcl55 claims
- Trazodone Hcl50 claims
- Quetiapine Fumarate42 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.
Charlene B. Spencer among 3,099 hospitalist physician records in California
Charlene B. Spencer, 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 fileNo · 81% of these records are
- Record last updated2026 · 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).
68 hospitalist physician records list a practice address in Walnut Creek
They are 68 of the 6,170 NPPES records with a practice address in Walnut Creek, and 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in Walnut Creek → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Anna Bavykina, MDWalnut Creek, CA 945961467530535
- Michael Fein, MDWalnut Creek, CA 945961942388046
- Prathibha Gubbi Ravishankar, MDWalnut Creek, CA 945961528146693
- Ravinder Gupta, MDWalnut Creek, CA 945961649358714
- Brent Levenfeld, MDWalnut Creek, CA 945961154409233
- Tsao-Yu Liang, MDWalnut Creek, CA 945961053499137
- Ramon Ortiz, MDWalnut Creek, CA 945961376621433
- Peter Rowe, M.D.Walnut Creek, CA 945961700831922
Common questions
What is Charlene B. Spencer, M.D.'s NPI number?
Charlene B. Spencer, M.D.'s National Provider Identifier (NPI) is 1821037367, issued on Jun 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Charlene B. Spencer, M.D. located?
The NPPES record lists a practice address at 801 Ygnacio Valley RD, Walnut Creek, CA, 94596. Phone: (925) 946-1080. Providers update this record themselves, so call before visiting.
How can I verify Charlene B. Spencer, M.D.'s license?
NPPES lists California license number G83176, 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 Charlene B. Spencer, M.D. prescribe under Medicare Part D?
In 2024, Charlene B. Spencer, M.D. had 1,136 Medicare Part D claims for 48 beneficiaries; the average among hospitalist physician prescribers was 521. Part D covers Medicare prescriptions only.
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.