William A. Rieck, DO
Sports Medicine (Physical Medicine & Rehabilitation) Physician · Sacramento, CA
William A. Rieck, DO is a sports medicine (physical medicine & rehabilitation) physician with a practice address in Sacramento, California, and NPI 1669992418, issued on Jun 22, 2017. Check the license (California 20A25378, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William A. Rieck
- Credential
- DO
- Primary taxonomy
- Sports Medicine (Physical Medicine & Rehabilitation) Physician 2081S0010X
- License numbers
- 20A25378 CA
2022-01128 NC
Self-reported in NPPES; status is on the state search - Practice location
- 3301 C St Ste 1600, Sacramento, CA 95816
- Phone
- (916) 734-6805
- Enumerated
- Jun 22, 2017
- Record last updated
- Jun 27, 2026
- Medicare enrollment
- Enrolled (PECOS I20220818000106); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest sports medicine (physical medicine & rehabilitation) physician records → All 127 in California → Look up another NPI →
Also registered at 3301 C St Ste 1600
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joseph DuffOrthopaedic Foot and Ankle Surgery Physician1215515416
- Alexandra Ernst, MD, MPHOrthopaedic Foot and Ankle Surgery Physician1144845900
- David HaganOrthopaedic Foot and Ankle Surgery Physician1992238257
- Daniel Herman, MD, PHDSports Medicine (Physical Medicine & Rehabilitation) Physician1245499060
- Marissa Jong-Delgado, PT, DPTPhysical Medicine & Rehabilitation Physician1922578814
- Richard Marder, MDSports Medicine (Orthopaedic Surgery) Physician1477543742
Verify William A. Rieck in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A25378Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
78% fewer Medicare Part D claims than the average sports medicine (physical medicine & rehabilitation) physician in 2024
88 Medicare Part D claims for 46 beneficiaries, against an average of 406 among the 410 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Gabapentin43 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): 98.3 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
- East Carolina UniversityGreenville, NC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William A. Rieck among 127 sports medicine (physical medicine & rehabilitation) physician records in California
William A. Rieck, DO is one of 127 sports medicine (physical medicine & rehabilitation) physician records with a practice address in California. 51% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 40% of them.
- NPI issued2017 · 40% of these records are older, 54% newer
- In a Medicare fileYes · 51% of these records are
- In the CMS Doctors and Clinicians fileYes · 46% of these records are
- Graduated2017 · median 2015 among the 59 with a school on file
- Record last updated2026 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2081S0010X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Sports Medicine (Physical Medicine & Rehabilitation) Physician providers in California
There are 127 sports medicine (physical medicine & rehabilitation) physician records in California.
All 127 in California → Every provider in Sacramento → Sports Medicine (Physical Medicine & Rehabilitation) Physician nationwide →
The 8 sports medicine (physical medicine & rehabilitation) physician records with the nearest ZIP codes
- Daniel Herman, MD, PHDSacramento, CA 958161245499060
- Dayton Snyder, MDSacramento, CA 958161275162950
- Alyssa Speciale, M.D.Sacramento, CA 958161396126249
- Lori Bjork, MDSacramento, CA 958171073048773
- Brandon HassidSacramento, CA 958171467913954
- Manoj Poudel, MDSacramento, CA 958171881128197
- Brandee WaiteSacramento, CA 958171144208885
- Alexandra Warrick, MDSacramento, CA 958171992120034
Common questions
What is William A. Rieck, DO's NPI number?
William A. Rieck, DO's National Provider Identifier (NPI) is 1669992418, issued on Jun 22, 2017. An NPI identifies a provider in billing; it is not a license.
Where is William A. Rieck, DO located?
The NPPES record lists a practice address at 3301 C St Ste 1600, Sacramento, CA, 95816. Phone: (916) 734-6805. Providers update this record themselves, so call before visiting.
How can I verify William A. Rieck, DO's license?
NPPES lists California license number 20A25378, 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 William A. Rieck, DO prescribe under Medicare Part D?
In 2024, William A. Rieck, DO had 88 Medicare Part D claims for 46 beneficiaries; the average among sports medicine (physical medicine & rehabilitation) physician prescribers was 406. Part D covers Medicare prescriptions only.
What is William A. Rieck, DO's MIPS final score?
The 2023 MIPS final score is 98.3 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.