NPPES file of Aug 9, 2026

Stacey Hannah Gunn, M.D.

Sleep Medicine (Internal Medicine) Physician · Irvine, CA

Stacey Hannah Gunn, M.D. is a sleep medicine (internal medicine) physician with a practice address in Irvine, California, and NPI 1710206503, issued on May 19, 2010. Check the license (California A127199, 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
1710206503
Name
Stacey Hannah Gunn
Credential
M.D.
Primary taxonomy
Sleep Medicine (Internal Medicine) Physician 207RS0012X
License numbers
A127199 CA
56272 AZ
ME172176 FL
MD-25122-0 HI
36.173784 IL
and 10 more
Self-reported in NPPES; status is on the state search
Practice location
530 Technology Dr Ste 100, Irvine, CA 92618
Phone
(213) 375-4070
Enumerated
May 19, 2010
Record last updated
May 19, 2026
Medicare enrollment
Enrolled (PECOS I20180910000643); accepts Medicare assignment
Medical or professional school
New York University School Of Medicine, 2010
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 530 Technology Dr Ste 100

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

  1. Sahil Chopra, MDSleep Medicine (Internal Medicine) Physician1245545326

Verify Stacey Hannah Gunn in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A127199    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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37% fewer Medicare Part D claims than the average sleep medicine (internal medicine) physician in 2024

366 Medicare Part D claims for 56 beneficiaries, against an average of 585 among the 852 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.

  1. Stacey Gunn366
  2. Specialty average585

Most prescribed

  1. Gabapentin84 claims
  2. Pramipexole Dihydrochloride37 claims
  3. Zolpidem Tartrate35 claims
  4. Clonazepam27 claims
  5. Neupro25 claims
  6. Eszopiclone23 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: $1,352.09

26 payments; by number, the most common kind was food and beverage; the largest payer was Zoll Respicardia, 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. Stacey Gunn$1,352.09
  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. The Insomnia And Sleep Institute OF Arizona LLCScottsdale, AZ

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

Stacey Hannah Gunn among 129 sleep medicine (internal medicine) physician records in California

Stacey Hannah Gunn, 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 2010, is newer than 49% of them.

  • NPI issued2010 · 49% of these records are older, 49% newer
  • In a Medicare fileYes · 95% of these records are
  • In the CMS Doctors and Clinicians fileYes · 82% of these records are
  • Graduated2010 · median 2006 among the 106 with a school on file
  • Record last updated2026 · 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 Irvine → Sleep Medicine (Internal Medicine) Physician nationwide →

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

  1. Sahil Chopra, MDIrvine, CA 926181245545326
  2. Wesley Fleming, MDIrvine, CA 926041205922945
  3. Rajanigandha Dhokarh, M.DWildomar, CA 925951144417130
  4. Robert Lebby, MDAliso Viejo, CA 926561457344129
  5. Bruce Tammelin, M.D.Newport Beach, CA 926631942288709
  6. Delmer Henninger, MDMurrieta, CA 925631942394390
  7. George Schiffman, M.D.Mission Viejo, CA 926911104803188
  8. Isaac Reinherz, MDRiverside, CA 925061396372215

Common questions

What is Stacey Hannah Gunn, M.D.'s NPI number?

Stacey Hannah Gunn, M.D.'s National Provider Identifier (NPI) is 1710206503, issued on May 19, 2010. An NPI identifies a provider in billing; it is not a license.

Where is Stacey Hannah Gunn, M.D. located?

The NPPES record lists a practice address at 530 Technology Dr Ste 100, Irvine, CA, 92618. Phone: (213) 375-4070. Providers update this record themselves, so call before visiting.

How can I verify Stacey Hannah Gunn, M.D.'s license?

NPPES lists California license number A127199, 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 Stacey Hannah Gunn, M.D. prescribe under Medicare Part D?

In 2024, Stacey Hannah Gunn, M.D. had 366 Medicare Part D claims for 56 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.