2026 NPPES data Emergency Medicine Physician NPI 1083658884 M.D
Verify on CMS →

ALEXANDER LEE, M.D

Emergency Medicine Physician in APPLE VALLEY, 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
145
Medicare Part D claims · 115 beneficiaries · Emergency Medicine Physician avg: 352

What the federal data shows

ALEXANDER LEE, M.D filed 145 Medicare Part D claims in 2023 as a Emergency Medicine Physician in APPLE VALLEY, California.

145
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.

ALEXANDER LEE, M.D's Medicare Part D volume vs every U.S. prescriber

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

145 35th percentile higher than 35% 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)

ALEXANDER LEE, M.D practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations — 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 ALEXANDER LEE, M.D?

Quality data not reported

NPI registry status

Active

Issued 06/15/2006

NPI 1083658884

Primary specialty

Emergency Medicine Physician

High-volume

64,398 US NPIs in this specialty

Medicare Part D claims

145 59% vs specialty avg

2023 prescription claims

Specialty avg: 352

Specialty distribution in California

How Emergency Medicine Physician compares to other specialties among California providers

California providers

Emergency Medicine Physician share within California

1. Emergency Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Emergency Medicine Physician share within California

Specialty board-certification context

Estimated specialty board-certified rate — Emergency Medicine Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Emergency Medicine Physician ABMS/AOA estimate

Est. board-certified rate (Emergency Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Emergency Medicine 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).

ALEXANDER LEE, M.D appears in the CMS NPPES registry as a Emergency Medicine Physician provider holding M.D credentials at 18300 HIGHWAY 18, APPLE VALLEY, CA, 92307, with a listed phone of (760) 242-2311. NPI 1083658884 was issued on 06/15/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what LEE 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 145 prescription claims written by this provider, covering 115 Medicare beneficiaries and totaling roughly $1K 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.

Emergency Medicine Physician is a high-volume specialty nationwide, with 64,398 enrolled providers across 56 states and an average of 352 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

18300 HIGHWAY 18
APPLE VALLEY, CA 92307

Provider Details

NPI 1083658884
Specialty Emergency Medicine Physician
Credentials M.D
Gender Male
NPI Issued 06/15/2006

Hospital and facility affiliations

Facilities where ALEXANDER LEE, 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.

IGNITE EMERGENCY PHYSICIANS A MEDICAL CORPORATION
MONTCLAIR, CA
SAN DIMAS EMERGENCY MEDICAL ASSOCIATES INC.
SAN DIMAS, 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 ALEXANDER LEE, M.D. To verify ALEXANDER LEE, 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.

145
Total Claims
$1K
Total Drug Cost
115
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
149
Total Day Supply
1,497
Generic Drug Cost
$1K
Antibiotic Claims
82

Patient Demographics

Average Patient Age
71.6 years
Avg HCC Risk Score
1.47
Gender Split
62% female / 38% male
Age Distribution
<65: 16, 65-74: 48, 75-84: 38, 85+: 13

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Azithromycin
21
Amoxicillin-Clavulanate Potass
Amoxicillin/Potassium Clav
14

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Emergency Medicine Physician Overview

How ALEXANDER LEE, M.D fits within the Emergency Medicine Physician landscape nationally.

64,398
Emergency Medicine Physician Providers in US
56
States with Emergency Medicine Physician
352
Avg Claims per Provider

ALEXANDER LEE, M.D's 145 claims are below the specialty average of 352.

Nearby Emergency Medicine Physician Providers in California

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

Compare Emergency Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is ALEXANDER LEE, M.D's specialty?
ALEXANDER LEE, M.D specializes in Emergency Medicine Physician and practices in APPLE VALLEY, California. Credentials: M.D.
How much does ALEXANDER LEE, M.D prescribe under Medicare Part D?
In 2023, ALEXANDER LEE, M.D wrote 145 Medicare Part D claims totaling $1K in drug costs for 115 beneficiaries.
Where is ALEXANDER LEE, M.D located?
ALEXANDER LEE, M.D is located at 18300 HIGHWAY 18, APPLE VALLEY, CA, 92307. Phone: (760) 242-2311.
What is ALEXANDER LEE, M.D's NPI number?
ALEXANDER LEE, M.D's National Provider Identifier (NPI) is 1083658884, issued on 06/15/2006.
How many Emergency Medicine Physician providers are there in the US?
There are 64,398 Emergency Medicine Physician providers across 56 states in the US. The average Emergency Medicine Physician provider writes 352 Medicare Part D claims per year.
What drugs does ALEXANDER LEE, M.D prescribe most often?
Based on 2023 Medicare Part D data, ALEXANDER LEE, M.D's most frequently prescribed drugs include Azithromycin, Amoxicillin-Clavulanate Potass. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ALEXANDER LEE, M.D accept Medicare?
ALEXANDER LEE, M.D appears in CMS Medicare data with 145 Part D claims and 115 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ALEXANDER LEE, M.D's credentials?
ALEXANDER LEE, M.D's NPI is 1083658884 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