NPPES file of Aug 9, 2026

John Chatfield Hiserodt, M.D.

Cytopathology Physician · Garden Grove, CA

John Chatfield Hiserodt, M.D. is a cytopathology physician with a practice address in Garden Grove, California, and NPI 1235296864, issued on Jan 2, 2007. Check the license (California G77372, 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 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1235296864
Name
John Chatfield Hiserodt
Credential
M.D.
Primary taxonomy
Cytopathology Physician 207ZC0500X
License number
G77372 CA
Self-reported in NPPES; status is on the state search
Practice location
7707 Garden Grove Blvd, Garden Grove, CA 92841
Phone
(714) 902-1762
Enumerated
Jan 2, 2007
Record last updated
Mar 13, 2019 (not updated in 7 years: call before relying on the address or phone)
Fax
(657) 400-9073
Medicaid ID
00G773720 CA
Medicare enrollment
Enrolled (PECOS I20070427000583); accepts Medicare assignment
Medical or professional school
University Of California, Geffen School Of Medicine, 1983
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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Verify John Chatfield Hiserodt in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G77372
    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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Bills Medicare through one group practice

  1. DE LA Paz Medical Centre IncAnaheim, CA

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

John Chatfield Hiserodt among 75 cytopathology physician records in California

John Chatfield Hiserodt, M.D. is one of 75 cytopathology physician records with a practice address in California. 52% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 67% of them.

  • NPI issued2007 · 67% of these records are older, 19% newer
  • In a Medicare fileYes · 52% of these records are
  • In the CMS Doctors and Clinicians fileYes · 37% of these records are
  • Graduated1983 · median 1996 among the 28 with a school on file
  • Record last updated2019 · 45% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ZC0500X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Cytopathology Physician providers in California

There are 75 cytopathology physician records in California.

The 8 cytopathology physician records with the nearest ZIP codes

  1. Jon Lake, MDGarden Grove, CA 928431295768786
  2. Maher Badir, M.D.Ladera Ranch, CA 926941295947786
  3. Thomas Cooper, MDWestminster, CA 926831275594913
  4. Adele Hieshima, M.D.Irvine, CA 926181215158068
  5. Robert Hubbard, M.D.San Bernardino, CA 924111508840786
  6. David Hewitt, MDVisalia, CA 932921124018148
  7. John Morrison, MDVisalia, CA 932921821087933
  8. Wilson Chick, M.D.Loma Linda, CA 923541104849090

Common questions

What is John Chatfield Hiserodt, M.D.'s NPI number?

John Chatfield Hiserodt, M.D.'s National Provider Identifier (NPI) is 1235296864, issued on Jan 2, 2007. An NPI identifies a provider in billing; it is not a license.

Where is John Chatfield Hiserodt, M.D. located?

The NPPES record lists a practice address at 7707 Garden Grove Blvd, Garden Grove, CA, 92841. Phone: (714) 902-1762. Providers update this record themselves, so call before visiting.

How can I verify John Chatfield Hiserodt, M.D.'s license?

NPPES lists California license number G77372, 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.

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.