Rhonda C. Caldwell-Williams, MD
Physical Medicine & Rehabilitation Physician · Oakland, CA
Rhonda C. Caldwell-Williams, MD is a physical medicine & rehabilitation physician with a practice address in Oakland, California, and NPI 1629163340, issued on Oct 4, 2006. Check the license (California G77907, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Rhonda C. Caldwell-Williams
- Credential
- MD
- Primary taxonomy
- Physical Medicine & Rehabilitation Physician 208100000X
- License number
- G77907 CA
Self-reported in NPPES; status is on the state search - Practice location
- 275 W Macarthur Blvd, Oakland, CA 94611
- Phone
- (510) 752-1000
- Enumerated
- Oct 4, 2006
- Record last updated
- Jan 10, 2022
- Medicaid ID
- 00G779070 CA
- Entity
- Type 1 · individual
8 nearest physical medicine & rehabilitation physician records → All 1,549 in California → Look up another NPI →
Also registered at 275 W Macarthur Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Rhonda C. Caldwell-Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G77907Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
77% fewer Medicare Part D claims than the average physical medicine & rehabilitation physician in 2024
168 Medicare Part D claims for 52 beneficiaries, against an average of 727 among the 7,448 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Most prescribed
- Baclofen87 claims
- Tizanidine Hcl19 claims
- Atorvastatin Calcium15 claims
- Dantrolene Sodium15 claims
- Gabapentin12 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.
Rhonda C. Caldwell-Williams among 1,549 physical medicine & rehabilitation physician records in California
Rhonda C. Caldwell-Williams, MD is one of 1,549 physical medicine & rehabilitation physician records with a practice address in California. 59% 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 3% of them.
- NPI issued2006 · 3% of these records are older, 70% newer
- In a Medicare fileYes · 59% of these records are
- In the CMS Doctors and Clinicians fileNo · 51% of these records are
- Record last updated2022 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208100000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Physical Medicine & Rehabilitation Physician providers in California
There are 1,549 physical medicine & rehabilitation physician records in California.
All 1,549 in California → Every provider in Oakland → Physical Medicine & Rehabilitation Physician nationwide →
The 8 physical medicine & rehabilitation physician records with the nearest ZIP codes
- Richard Aptaker, DOOakland, CA 946111962580761
- Laura CannonOakland, CA 946111619471554
- Joseph Chun, D.O.Oakland, CA 946111780678789
- Margaret Cosgrove, DPTOakland, CA 946111043723695
- Suparna Dutta, MDOakland, CA 946111275611048
- Chiachen Hsu, MDOakland, CA 946111215015003
- Xiaohua Jiang, MDOakland, CA 946111861544660
- Stacy Lam, MDOakland, CA 946111497214720
Common questions
What is Rhonda C. Caldwell-Williams, MD's NPI number?
Rhonda C. Caldwell-Williams, MD's National Provider Identifier (NPI) is 1629163340, issued on Oct 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Rhonda C. Caldwell-Williams, MD located?
The NPPES record lists a practice address at 275 W Macarthur Blvd, Oakland, CA, 94611. Phone: (510) 752-1000. Providers update this record themselves, so call before visiting.
How can I verify Rhonda C. Caldwell-Williams, MD's license?
NPPES lists California license number G77907, 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 Rhonda C. Caldwell-Williams, MD prescribe under Medicare Part D?
In 2024, Rhonda C. Caldwell-Williams, MD had 168 Medicare Part D claims for 52 beneficiaries; the average among physical medicine & rehabilitation physician prescribers was 727. 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.