2026 NPPES data Critical Care Medicine (Anesthesiology) Physician NPI 1336324979 M.D.
Verify on CMS →

GARY SHIH, M.D.

Critical Care Medicine (Anesthesiology) Physician in LOMA LINDA, California. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
20
Medicare Part D claims · Critical Care Medicine (Anesthesiology) Physician avg: 409

What the federal data shows

GARY SHIH, M.D. filed 20 Medicare Part D claims in 2023 as a Critical Care Medicine (Anesthesiology) Physician in LOMA LINDA, California.

20
Part D claims, 2023
Likely
board-certified (heuristic)

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) — no proprietary rating or editorial opinion is applied.

GARY SHIH, M.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

20 0th percentile higher than 0% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Medicare Part D Prescriber Public Use File · 2023

Board certification likely (heuristic — not verified)

GARY SHIH, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about GARY SHIH, M.D.?

Quality data not reported

NPI registry status

Active

Issued 01/02/2008

NPI 1336324979

Primary specialty

Critical Care Medicine (Anesthesiology) Physician

Niche

1,398 US NPIs in this specialty

Medicare Part D claims

20 95% vs specialty avg

2023 prescription claims

Specialty avg: 409

Specialty distribution in California

How Critical Care Medicine (Anesthesiology) Physician compares to other specialties among California providers

California providers

Critical Care Medicine (Anesthesiology) Physician share within California

1. Critical Care Medicine (Anesthesiology) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Critical Care Medicine (Anesthesiology) Physician share within California

Specialty board-certification context

Estimated specialty board-certified rate — Critical Care Medicine (Anesthesiology) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Critical Care Medicine (Anesthesiology) Physician ABMS/AOA estimate

Est. board-certified rate (Critical Care Medicine (Anesthesiology) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Critical Care Medicine (Anesthesiology) Physician) — ABMS / AOA estimate

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

GARY SHIH, M.D. is a Critical Care Medicine (Anesthesiology) Physician provider practicing in LOMA LINDA, California, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1336324979. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

GARY SHIH, M.D. appears in the CMS NPPES registry as a Critical Care Medicine (Anesthesiology) Physician provider holding M.D. credentials at 11234 ANDERSON ST, LOMA LINDA, CA, 92354, with a listed phone of (909) 558-4475. NPI 1336324979 was issued on 01/02/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what SHIH most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 20 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $395 in drug spend. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Critical Care Medicine (Anesthesiology) Physician is a narrow specialty nationwide, with 1,398 enrolled providers across 46 states and an average of 409 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

11234 ANDERSON ST
LOMA LINDA, CA 92354

Provider Details

NPI 1336324979
Specialty Critical Care Medicine (Anesthesiology) Physician
Credentials M.D.
Gender Male
NPI Issued 01/02/2008

Hospital and facility affiliations

Facilities where GARY SHIH, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

CRITICAL CARE SERVICES PC
IRVINE, CA

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

License & disciplinary context — California MBC 2023 annual report

Aggregate state board data only — NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 — they are NOT specific to GARY SHIH, M.D.. To verify GARY SHIH, M.D.'s current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases

MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

20
Total Claims
$395
Total Drug Cost
N/A
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
52
Total Day Supply
1,560
Brand Drug Cost
$0
Generic Drug Cost
$395

Patient Demographics

Average Patient Age
76.5 years
Avg HCC Risk Score
0.36

Critical Care Medicine (Anesthesiology) Physician Overview

How GARY SHIH, M.D. fits within the Critical Care Medicine (Anesthesiology) Physician landscape nationally.

1,398
Critical Care Medicine (Anesthesiology) Physician Providers in US
46
States with Critical Care Medicine (Anesthesiology) Physician
409
Avg Claims per Provider

GARY SHIH, M.D.'s 20 claims are below the specialty average of 409.

Nearby Critical Care Medicine (Anesthesiology) Physician Providers in California

Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as SHIH.

Compare Critical Care Medicine (Anesthesiology) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is GARY SHIH, M.D.'s specialty?
GARY SHIH, M.D. specializes in Critical Care Medicine (Anesthesiology) Physician and practices in LOMA LINDA, California. Credentials: M.D..
How much does GARY SHIH, M.D. prescribe under Medicare Part D?
In 2023, GARY SHIH, M.D. wrote 20 Medicare Part D claims totaling $395 in drug costs for N/A beneficiaries.
Where is GARY SHIH, M.D. located?
GARY SHIH, M.D. is located at 11234 ANDERSON ST, LOMA LINDA, CA, 92354. Phone: (909) 558-4475.
What is GARY SHIH, M.D.'s NPI number?
GARY SHIH, M.D.'s National Provider Identifier (NPI) is 1336324979, issued on 01/02/2008.
How many Critical Care Medicine (Anesthesiology) Physician providers are there in the US?
There are 1,398 Critical Care Medicine (Anesthesiology) Physician providers across 46 states in the US. The average Critical Care Medicine (Anesthesiology) Physician provider writes 409 Medicare Part D claims per year.
Does GARY SHIH, M.D. accept Medicare?
GARY SHIH, M.D. appears in CMS Medicare data with 20 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify GARY SHIH, M.D.'s credentials?
GARY SHIH, M.D.'s NPI is 1336324979 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology