NPPES file of Aug 9, 2026

William Hart, M.D.

Sleep Medicine (Internal Medicine) Physician · Capitola, CA

William Hart, M.D. is a sleep medicine (internal medicine) physician with a practice address in Capitola, California, and NPI 1609856582, issued on Jan 18, 2006. Check the license (California G62162, 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
1609856582
Name
William Hart
Credential
M.D.
Primary taxonomy
Sleep Medicine (Internal Medicine) Physician 207RS0012X
License number
G62162 CA
Self-reported in NPPES; status is on the state search
Practice location
815 Bay Ave, Capitola, CA 95010
Phone
(831) 460-7300
Enumerated
Jan 18, 2006
Record last updated
Dec 7, 2017 (not updated in 9 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20080628000174); accepts Medicare assignment
Medical or professional school
Ponce School Of Medicine, 1986
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 sleep medicine (internal medicine) physician records → All 129 in California → Look up another NPI →

Also registered at 815 Bay Ave

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

  1. Saqib Ansari, MDSleep Medicine (Family Medicine) Physician1659546893
  2. Michelle BradleyClinical Exercise Physiologist1093198103
  3. Deepti Chandran, MDSleep Medicine (Psychiatry & Neurology) Physician1093839532
  4. Gursharan Gill, MDEndocrinology, Diabetes & Metabolism Physician1548243827
  5. Kathleen Hansen, RD, CDERegistered Dietitian1811206378
  6. Zaureen Kapadia, M.D.Endocrinology, Diabetes & Metabolism Physician1558600551

Verify William Hart in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G62162    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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73% fewer Medicare Part D claims than the average sleep medicine (internal medicine) physician in 2024

156 Medicare Part D claims for 51 beneficiaries, against an average of 585 among the 852 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.

  1. William Hart156
  2. Specialty average585

Most prescribed

  1. Clonazepam41 claims
  2. Pramipexole Dihydrochloride35 claims
  3. Gabapentin23 claims
  4. Trazodone Hcl13 claims
  5. Modafinil12 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: $339.91

10 payments; by number, the most common kind was food and beverage; the largest payer was Inspire Medical Systems, Inc. The 664 providers of this specialty with any payment received $3,724.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. William Hart$339.91
  2. Specialty average$3,724.37

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. Sutter Bay Medical FoundationSanta Cruz, CA

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

William Hart among 129 sleep medicine (internal medicine) physician records in California

William Hart, M.D. is one of 129 sleep medicine (internal medicine) physician records with a practice address in California. 95% 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 5% of them.

  • NPI issued2006 · 5% of these records are older, 71% newer
  • In a Medicare fileYes · 95% of these records are
  • In the CMS Doctors and Clinicians fileYes · 82% of these records are
  • Graduated1986 · median 2006 among the 106 with a school on file
  • Record last updated2017 · 35% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RS0012X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Sleep Medicine (Internal Medicine) Physician providers in California

There are 129 sleep medicine (internal medicine) physician records in California.

All 129 in California → Every provider in Capitola → Sleep Medicine (Internal Medicine) Physician nationwide →

The 8 sleep medicine (internal medicine) physician records with the nearest ZIP codes

  1. Jennifer Acostamadiedo, MDSanta Cruz, CA 950651417479288
  2. Sirish Nakka, MDSanta Cruz, CA 950651619406725
  3. Poulomee Tripathi, MDSanta Cruz, CA 950651255071049
  4. Yishui Chen, MDNovato, CA 949451619546884
  5. Laura Mullen, MDNovato, CA 949451992373930
  6. Brian Rodysill, MDNovato, CA 949451093291635
  7. Jenny Tran, DONovato, CA 949451750917753
  8. Ajitpal Sethi, M.D.Stockton, CA 952091235322603

Common questions

What is William Hart, M.D.'s NPI number?

William Hart, M.D.'s National Provider Identifier (NPI) is 1609856582, issued on Jan 18, 2006. An NPI identifies a provider in billing; it is not a license.

Where is William Hart, M.D. located?

The NPPES record lists a practice address at 815 Bay Ave, Capitola, CA, 95010. Phone: (831) 460-7300. Providers update this record themselves, so call before visiting.

How can I verify William Hart, M.D.'s license?

NPPES lists California license number G62162, 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 Hart, M.D. prescribe under Medicare Part D?

In 2024, William Hart, M.D. had 156 Medicare Part D claims for 51 beneficiaries; the average among sleep medicine (internal medicine) physician prescribers was 585. 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.