NPPES file of Aug 9, 2026

Shaun David Carstairs, M.D.

Emergency Medicine Physician · Chula Vista, CA

Shaun David Carstairs, M.D. is an emergency medicine physician with a practice address in Chula Vista, California, and NPI 1255301602, issued on Jan 26, 2006. Check the license (California A71434, 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 2023 and 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1255301602
Name
Shaun David Carstairs
Credential
M.D.
Primary taxonomy
Emergency Medicine Physician 207P00000X
License numbers
A71434 CA
326862 LA
Self-reported in NPPES; status is on the state search
Practice location
435 H St, Chula Vista, CA 91910
Phone
(619) 691-7290
Enumerated
Jan 26, 2006
Record last updated
May 28, 2025
Medicaid IDs
00A714340 CA
2687271 LA
Medicare enrollment
Enrolled (PECOS I20250416001716); accepts Medicare assignment
Medical or professional school
Uniformed Services Uhs Fe Hebert School Of Med, 1998
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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Also registered at 435 H St

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

  1. Zina Abbas, M.D.Hospitalist Physician1962799189
  2. Kirsten AlsuaStudent in an Organized Health Care Education/Training Program1134975162
  3. Gabrielle Armijo, MDStudent in an Organized Health Care Education/Training Program1336833987
  4. Azita Aslian, MDObstetrics & Gynecology Physician1851667661
  5. Nicole Marie BarcegaAddiction Medicine (Family Medicine) Physician1538801402
  6. Jazmin Barcenas, MDStudent in an Organized Health Care Education/Training Program1790589448

Verify Shaun David Carstairs in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A71434
    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

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17% fewer Medicare Part D claims than the average emergency medicine physician in 2024

187 Medicare Part D claims for 150 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 31 claims were for opioids.

  1. Shaun Carstairs187
  2. Specialty average226

Most prescribed

  1. Cephalexin22 claims
  2. Hydrocodone-Acetaminophen22 claims
  3. Naproxen14 claims
  4. Ondansetron Hcl11 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 practice group's MIPS final score for 2023 (Medicare payment program): 88 of 100

The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.

  1. Qualityout of 100 · 30% of the final score74.1
  2. Costnot scored (reweighted)
  3. Promoting interoperabilitynot scored (reweighted)
  4. Improvement activities40 of 40 points · 15%100.0

Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).

Industry payments in 2024: $155.58

1 payment: food and beverage; the largest payer was Penumbra, Inc. The 12,335 providers of this specialty with any payment received $953.79 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Shaun Carstairs$155.58
  2. Specialty average$953.79

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

2 hospitals and group practices

  1. Morehouse General HospitalBastrop, LA · Acute Care Hospitals2 of 5 stars
  2. Chula Vista Emergency Room Physicians A Medical CorporationChula Vista, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

Emergency Medicine Physician providers in California

There are 7,751 emergency medicine physician records in California.

Other emergency medicine physician records in California

  1. Cooper Aakhus, MDStanford, CA1194351007
  2. Pyra Aarden, MDMartinez, CA1417058199
  3. Neal Aaron, D.O.Encinitas, CA1114283520
  4. Eric AaserudeWalnut Creek, CA1811491194
  5. Nader Abas, MDBarstow, CA1346288305
  6. Michael Abbo, MDNovato, CA1205819042
  7. Daniel Abbott, MDFullerton, CA1518907864
  8. Paul-Andre Abboud, M.D.Oakland, CA1710065503
  9. Mostafa Abdel-Hamid, MDStanford, CA1457918740
  10. Ashraf Abdel-KerimChino, CA1396961538

Common questions

What is Shaun David Carstairs, M.D.'s NPI number?

Shaun David Carstairs, M.D.'s National Provider Identifier (NPI) is 1255301602, issued on Jan 26, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Shaun David Carstairs, M.D. located?

The NPPES record lists a practice address at 435 H St, Chula Vista, CA, 91910. Phone: (619) 691-7290. Providers update this record themselves, so call before visiting.

How can I verify Shaun David Carstairs, M.D.'s license?

NPPES lists California license number A71434, 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 Shaun David Carstairs, M.D. prescribe under Medicare Part D?

In 2024, Shaun David Carstairs, M.D. had 187 Medicare Part D claims for 150 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.

What is Shaun David Carstairs, M.D.'s MIPS final score?

The 2023 MIPS final score is 88 of 100, reported for the practice group. 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.