NPPES file of Aug 9, 2026

Carl Walter Fieser, M.D.

Pain Medicine (Physical Medicine & Rehabilitation) Physician · Walnut Creek, CA

Carl Walter Fieser, M.D. is a pain medicine (physical medicine & rehabilitation) physician with a practice address in Walnut Creek, California, and NPI 1346515319, issued on Mar 9, 2012. Check the license (California A96870, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1346515319
Name
Carl Walter Fieser
Credential
M.D.
Primary taxonomy
Pain Medicine (Physical Medicine & Rehabilitation) Physician 2081P2900X
License number
A96870 CA
Self-reported in NPPES; status is on the state search
Practice location
450 N Wiget LN, Walnut Creek, CA 94598
Phone
(925) 691-9806
Enumerated
Mar 9, 2012
Record last updated
Sep 13, 2012 (not updated in 14 years: call before relying on the address or phone)
Fax
(925) 691-9807
Medicare enrollment
Enrolled (PECOS I20121004000369); accepts Medicare assignment
Medical or professional school
University Of Kansas School Of Med (Kc/Wich/Sal), 2002
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest pain medicine (physical medicine & rehabilitation) physician records → All 290 in California → Look up another NPI →

Also registered at 450 N Wiget LN

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Sharmin AliFamily Nurse Practitioner1164996112
  2. Kasra Amirdelfan, MDPain Medicine Physician1033113642
  3. Harkamaljit Chagger, FNPFamily Nurse Practitioner1245007269
  4. Angela Danko, NPNurse Practitioner1417214776
  5. Neesha Dave, D.O.Physical Medicine & Rehabilitation Physician1386850253
  6. Jared DomaguingNurse Practitioner1609657741

Verify Carl Walter Fieser in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A96870    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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50% fewer Medicare Part D claims than the average pain medicine (physical medicine & rehabilitation) physician in 2024

746 Medicare Part D claims for 165 beneficiaries, against an average of 1,479 among the 1,457 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims. 373 claims were for opioids.

  1. Carl Fieser746
  2. Specialty average1,479

Most prescribed

  1. Hydrocodone-Acetaminophen221 claims
  2. Gabapentin107 claims
  3. Oxycodone Hcl58 claims
  4. Naloxone Hcl30 claims
  5. Tizanidine Hcl28 claims
  6. Zolpidem Tartrate21 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.

Industry payments in 2024: $366.84

17 payments; by number, the most common kind was food and beverage; the largest payer was Electronic Waveform Lab, Inc. The 1,126 providers of this specialty with any payment received $2,193.30 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Carl Fieser$366.84
  2. Specialty average$2,193.30

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Integrated Pain Management Medical Group IncSanta Rosa, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Carl Walter Fieser among 290 pain medicine (physical medicine & rehabilitation) physician records in California

Carl Walter Fieser, M.D. is one of 290 pain medicine (physical medicine & rehabilitation) physician records with a practice address in California. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 68% of them.

  • NPI issued2012 · 68% of these records are older, 29% newer
  • In a Medicare fileYes · 85% of these records are
  • In the CMS Doctors and Clinicians fileYes · 68% of these records are
  • Graduated2002 · median 2005 among the 196 with a school on file
  • Record last updated2012 · 50% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2081P2900X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Pain Medicine (Physical Medicine & Rehabilitation) Physician providers in California

There are 290 pain medicine (physical medicine & rehabilitation) physician records in California.

All 290 in California → Every provider in Walnut Creek → Pain Medicine (Physical Medicine & Rehabilitation) Physician nationwide →

The 8 pain medicine (physical medicine & rehabilitation) physician records with the nearest ZIP codes

  1. Michael Chang, D.O.Walnut Creek, CA 945981205934262
  2. David Chow, M.D.Walnut Creek, CA 945981700823762
  3. Kenneth Kim, MDWalnut Creek, CA 945981154325777
  4. Mikiko Murakami, DOWalnut Creek, CA 945971659632339
  5. Robert Millard, MDRedwood City, CA 946031699729426
  6. Alan Kimelman, M.D.Vallejo, CA 945901558474866
  7. Ryan Ferguson, DOUnion City, CA 945871487116000
  8. Michael Hebrard, MDOakland, CA 946101861575300

Common questions

What is Carl Walter Fieser, M.D.'s NPI number?

Carl Walter Fieser, M.D.'s National Provider Identifier (NPI) is 1346515319, issued on Mar 9, 2012. An NPI identifies a provider in billing; it is not a license.

Where is Carl Walter Fieser, M.D. located?

The NPPES record lists a practice address at 450 N Wiget LN, Walnut Creek, CA, 94598. Phone: (925) 691-9806. Providers update this record themselves, so call before visiting.

How can I verify Carl Walter Fieser, M.D.'s license?

NPPES lists California license number A96870, 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 Carl Walter Fieser, M.D. prescribe under Medicare Part D?

In 2024, Carl Walter Fieser, M.D. had 746 Medicare Part D claims for 165 beneficiaries; the average among pain medicine (physical medicine & rehabilitation) physician prescribers was 1,479. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.