2026 NPPES data Retina Specialist (Ophthalmology) Physician NPI 1033505219 M.D.
Verify on CMS →

ALEXANDER JUHN, M.D.

Retina Specialist (Ophthalmology) Physician in LOS ANGELES, 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
1K
Medicare Part D claims · 377 beneficiaries · Retina Specialist (Ophthalmology) Physician avg: 558
Generic prescribing
77%
generic claims · 23% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: ALEXANDER JUHN, M.D. is a Retina Specialist (Ophthalmology) Physician ([object Object]) practicing in LOS ANGELES, California with a Medicare Part D prescribing footprint of 1K claims across 377 beneficiaries — 23% brand-name prescribing .

What stands out: ALEXANDER JUHN, M.D. filed 1,204 Medicare Part D claims in 2023 across LOS ANGELES, California. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

ALEXANDER JUHN, 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).

ALEXANDER JUHN, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 04/14/2015

NPI 1033505219

Primary specialty

Retina Specialist (Ophthalmology) Physician

Niche

913 US NPIs in this specialty

Medicare Part D claims

1,204 116% vs specialty avg

2023 prescription claims

Specialty avg: 558

Specialty distribution in California

How Retina Specialist (Ophthalmology) Physician compares to other specialties among California providers

California providers

Retina Specialist (Ophthalmology) Physician share within California

1. Retina Specialist (Ophthalmology) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Retina Specialist (Ophthalmology) Physician share within California

Specialty board-certification context

Estimated specialty board-certified rate — Retina Specialist (Ophthalmology) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Retina Specialist (Ophthalmology) Physician ABMS/AOA estimate

Est. board-certified rate (Retina Specialist (Ophthalmology) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Retina Specialist (Ophthalmology) 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 JUHN, M.D. is a Retina Specialist (Ophthalmology) Physician provider practicing in LOS ANGELES, California, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1033505219. 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.

ALEXANDER JUHN, M.D. appears in the CMS NPPES registry as a Retina Specialist (Ophthalmology) Physician provider holding M.D. credentials at 200 STEIN PLAZA #1-340, LOS ANGELES, CA, 90095, with a listed phone of (310) 825-5000. NPI 1033505219 was issued on 04/14/2015. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what JUHN 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 1,204 prescription claims written by this provider, covering 377 Medicare beneficiaries and totaling roughly $58K in drug spend, split 23% brand-name and 77% generic by claim count. 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.

Retina Specialist (Ophthalmology) Physician is a narrow specialty nationwide, with 913 enrolled providers across 48 states and an average of 558 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

200 STEIN PLAZA #1-340
LOS ANGELES, CA 90095

Provider Details

NPI 1033505219
Specialty Retina Specialist (Ophthalmology) Physician
Credentials M.D.
Gender Male
NPI Issued 04/14/2015

Hospital and facility affiliations

Facilities where ALEXANDER JUHN, 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.

PERMANENTE MEDICAL GROUP INC
SANTA ROSA, 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 JUHN, M.D.. To verify ALEXANDER JUHN, 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.

Brand vs generic prescribing mix · Typical

ALEXANDER JUHN, M.D. — brand share 23.0%
Specialty average (est.)

23% brand-name claims vs 77% generic, on 1,204 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

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

1,204
Total Claims
$58K
Total Drug Cost
377
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,532
Total Day Supply
70,696
Brand vs Generic
23% brand / 77% generic
Brand Drug Cost
$30K
Generic Drug Cost
$28K
Antibiotic Claims
12

Patient Demographics

Average Patient Age
76.5 years
Avg HCC Risk Score
1.20
Gender Split
53% female / 47% male

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Latanoprost
290
Dorzolamide-Timolol
Dorzolamide Hcl/Timolol Maleat
162
Prednisolone Acetate
130
Erythromycin
Erythromycin Base
75
Cyclosporine
74
Diclofenac Sodium
63
Neomycin-Polymyxin-Dexameth
Neomycin/Polymyxin B/Dexametha
56
Timolol Maleate
52
Brimonidine Tartrate
50
Levobunolol Hcl
33

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

Retina Specialist (Ophthalmology) Physician Overview

How ALEXANDER JUHN, M.D. fits within the Retina Specialist (Ophthalmology) Physician landscape nationally.

913
Retina Specialist (Ophthalmology) Physician Providers in US
48
States with Retina Specialist (Ophthalmology) Physician
558
Avg Claims per Provider

ALEXANDER JUHN, M.D.'s 1,204 claims are above the specialty average of 558.

Nearby Retina Specialist (Ophthalmology) Physician Providers in California

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

Compare Retina Specialist (Ophthalmology) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is ALEXANDER JUHN, M.D.'s specialty?
ALEXANDER JUHN, M.D. specializes in Retina Specialist (Ophthalmology) Physician and practices in LOS ANGELES, California. Credentials: M.D..
How much does ALEXANDER JUHN, M.D. prescribe under Medicare Part D?
In 2023, ALEXANDER JUHN, M.D. wrote 1,204 Medicare Part D claims totaling $58K in drug costs for 377 beneficiaries.
Where is ALEXANDER JUHN, M.D. located?
ALEXANDER JUHN, M.D. is located at 200 STEIN PLAZA #1-340, LOS ANGELES, CA, 90095. Phone: (310) 825-5000.
What is ALEXANDER JUHN, M.D.'s NPI number?
ALEXANDER JUHN, M.D.'s National Provider Identifier (NPI) is 1033505219, issued on 04/14/2015.
Does ALEXANDER JUHN, M.D. prescribe more brand-name or generic drugs?
ALEXANDER JUHN, M.D.'s prescribing is 23% brand-name and 77% generic drugs by claim count, with $30K in brand drug costs.
How many Retina Specialist (Ophthalmology) Physician providers are there in the US?
There are 913 Retina Specialist (Ophthalmology) Physician providers across 48 states in the US. The average Retina Specialist (Ophthalmology) Physician provider writes 558 Medicare Part D claims per year.
What drugs does ALEXANDER JUHN, M.D. prescribe most often?
Based on 2023 Medicare Part D data, ALEXANDER JUHN, M.D.'s most frequently prescribed drugs include Latanoprost, Dorzolamide-Timolol, Prednisolone Acetate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ALEXANDER JUHN, M.D. accept Medicare?
ALEXANDER JUHN, M.D. appears in CMS Medicare data with 1,204 Part D claims and 377 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ALEXANDER JUHN, M.D.'s credentials?
ALEXANDER JUHN, M.D.'s NPI is 1033505219 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