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2026 NPPES data Geriatric Psychiatry Physician NPI 1134153646 M.D.
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Ellen Fan, M.D.

Geriatric Psychiatry Physician in Plano, Texas.

This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 787 in Geriatric Psychiatry Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.

Federal data, no proprietary rating. We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
776
Medicare Part D claims · 88 beneficiaries · Geriatric Psychiatry Physician avg: 2K
Generic prescribing
98%
generic claims · 2% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
100/100
▲ 17 pts above national avg 83.5 · Exceptional
Verify NPI on CMS Methodology
Compiled from official public sources by the editorial process.

What the federal data shows

Ellen Fan, M.D. reported a CMS MIPS final score of 100/100 - above the 83.5 national average - and filed 776 Medicare Part D claims in 2024.

100/100
MIPS score · +17 vs avg
776
Part D claims, 2024
98%
generic prescribing
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.

Federal trust snapshot

What official records show about Ellen Fan, M.D.

Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.

  • Verified

    NPI registry status

    Active listing in the CMS National Provider Identifier Registry (NPI 1134153646), first enumerated 07/10/2006.

    Source: CMS NPPES

  • Reported

    Medicare Part D participation

    Filed 776 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.

    Source: CMS Part D Prescriber PUF

  • Reported

    CMS quality reporting (MIPS)

    Reported a CMS MIPS final score of 100/100 in the Quality Payment Program — a federal quality measure, not a patient review.

    Source: CMS Quality Payment Program

  • Reported

    Board certification signal

    Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.

    Source: NUCC taxonomy + CMS participation heuristic

  • State context

    State board disciplinary context

    Texas statewide board action statistics are published annually — these figures describe aggregate state activity, not Ellen Fan, M.D.'s individual license status. Verify directly with the state medical board.

    Source: TMB annual report 2023

  • Not in federal data

    Individual sanction lookup

    PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.

    Source: State medical board / FSMB

This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.

CMS NPPES provider registry desk

NPI 1134153646 · Geriatric Psychiatry Physician

NPI-10 · ENUM-LEGACY · TAX-NARROW · MIPS-ELITE · RX-LIGHT · BOOK-THIN · PHOTO-FINISH

  • NPI-10 1134153646
  • ENUM-LEGACY 2006
  • TAX-NARROW 787
  • MIPS-ELITE 100/100
  • RX-LIGHT 776
  • BOOK-THIN 43 in Texas
  • PHOTO-FINISH Nicole Aho, MD · ±0.0

MIPS final-score neighbourhood

Same-specialty nationwide peers by CMS final score, not geographic proximity

MIPS pts

What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).

Source CMS Quality Payment Program (MIPS) As of 2023

Ellen Fan, M.D.'s MIPS score vs every measured U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.

100 ≥ 92nd percentile 92% of 454,083 measured providers are in lower value bands

0–10: 8,684 measured providers (2%). Below this entry. 10–20: 3,008 measured providers (1%). Below this entry. 20–30: 3,069 measured providers (1%). Below this entry. 30–40: 2,746 measured providers (1%). Below this entry. 40–50: 2,928 measured providers (1%). Below this entry. 50–60: 5,882 measured providers (1%). Below this entry. 60–70: 13,906 measured providers (3%). Below this entry. 70–80: 94,570 measured providers (21%). Below this entry. 80–90: 129,887 measured providers (29%). Below this entry. 90+: 189,403 measured providers (42%). This entry sits in this band. This provider 0 100 every measured MIPS clinician, bucketed by value

Each bar is a band; taller bars hold more measured providers. 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.

The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.

Source CMS Merit-based Incentive Payment System (MIPS) · 2023

Where Ellen Fan, M.D. sits

This provider among geriatric psychiatry physician peers

Across the 104 geriatric psychiatry physician providers who report both Medicare Part D prescribing and a MIPS quality score, Ellen Fan, M.D. writes more Part D claims than 48% of them and scores higher on MIPS quality than 85% - placing this provider in the lower-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.

Lower volume · High qualityHigh volume · High qualityLower volume · Lower qualityHigh volume · Lower quality0255075100023.647.370.994.5Part D claim volume, percentile in specialtyMIPS quality, percentilePoint, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 47Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 12Point, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 13Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 78Point, Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 48Point, Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 8Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 20Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 80Point, Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 43Point, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 77Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 28Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 75Point, Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 53Point, Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 85Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 35Point, Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 37Point, Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 43Point, Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 40Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 88Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 18Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 33Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 63Ellen Fan, M.D., Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 85
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one geriatric psychiatry physician peer from a representative sample of 60; the gold marker is Ellen Fan, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

✓
Board certification likely (heuristic, not verified)

Ellen Fan, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 Ellen Fan, M.D.?

High performer (top quartile)

NPI registry status

Active

Issued 07/10/2006

NPI 1134153646

Primary specialty

Geriatric Psychiatry Physician

Niche

787 US NPIs in this specialty

Medicare Part D claims

776 51% vs specialty avg

2024 prescription claims

Specialty avg: 1,586

MIPS final score

100/100 16.5 pts vs avg

Exceptional band

vs 83.5 national avg

Specialty distribution in Texas

How Geriatric Psychiatry Physician compares to other specialties among Texas providers

Texas providers
Behavior Technician6%Student in an Organized Heal…5.3%Family Nurse Practitioner4.5%Professional Counselor4.4%Pharmacist4.3%Speech-Language Pathologist3.9%Geriatric Psychiatry Physici…0%
Largest specialties in Texas (% of in-state providers)

Medicare quality performance, MIPS

Ellen Fan, M.D.'s 2023 MIPS final score plotted against the Geriatric Psychiatry Physician national average

High performer (top quartile)
MIPS Final Score
100/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%99%
MIPS final score (Geriatric Psychiatry Physician) - 100/100 vs national avg 83.5
How MIPS and board certification work

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).

Practice Address

3308 PRESTON RD
Plano, TX 75093
(972) 769-8572

Provider Details

NPI 1134153646
Specialty Geriatric Psychiatry Physician
Credentials M.D.
Gender Female
NPI Issued 07/10/2006

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

100
Final Score
Measured-score avg: 83.5
95
Quality

Reporting: Individual

License & disciplinary context - Texas TMB 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 ~77K Texas medical licensees in 2023 - they are NOT specific to Ellen Fan, M.D.. To verify Ellen Fan, M.D.'s current license status, search the TMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

344
Total board actions, Texas 2023
Across 334 cases
4.47
Actions per 1,000 licensees
Texas statewide rate
probation
Most common action type
94 cases

TMB 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 Texas disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Generic-heavy

Ellen Fan, M.D. - brand share 2.0%
Geriatric Psychiatry Physician average

2% brand-name claims vs 98% generic, on 776 2024 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 2024.

776
Total Claims
$25K
Total Drug Cost
88
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
822
Total Day Supply
21,057
Brand vs Generic
2% brand / 98% generic
Brand Drug Cost
$8K
Generic Drug Cost
$18K

Patient Demographics

Average Patient Age
85.4 years
Avg HCC Risk Score
2.04
Gender Split
78% female / 22% male
Age Distribution
<65: 0, 65-74: 11, 75-84: 25, 85+: 52

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.

What Ellen Fan, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2024

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2024
Drug Claims
Quetiapine Fumarate
 99
Escitalopram Oxalate
 74
Clonazepam
 61
Sertraline Hcl
 55
Trazodone Hcl
 55
Mirtazapine
 50
Divalproex Sodium
 49
Gabapentin
 31
Venlafaxine Hcl Er
Venlafaxine Hcl
27
Alprazolam
 25

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

More Geriatric Psychiatry Physician in TX → All providers in Texas → Compare specialties →

Geriatric Psychiatry Physician Overview

How Ellen Fan, M.D. fits within the Geriatric Psychiatry Physician landscape nationally.

787
Geriatric Psychiatry Physician Providers in US
46
States with Geriatric Psychiatry Physician
1,586
Avg Claims per Provider

Ellen Fan, M.D.'s 776 claims are below the specialty average of 1,586.

Nationwide Geriatric Psychiatry Physician peers with similar MIPS or enrollment year

Two federal-record peer sets for Fan, both outside Texas so the neighborhoods are not geographic containment.

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (100 here).

Nicole Aho 100 NC William Apfeldorf 100 NY Ivan Cichowicz 100 FL Diana Feldman 100 NY

Same NPPES enumeration year (2006)

Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.

Kotra Ajir Los Angeles, CA Patricia Gilbert El Cajon, CA Cheryl France Hobe Sound, FL Howell Schrage Mount Kisco, NY

Nearby Geriatric Psychiatry Physician Providers in Texas

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

One of 43 Geriatric Psychiatry Physician providers enrolled in Texas, 5 are shown here.

Dr. Saima Alam
MD
Katy, TX
Dr. Ali Asghar-Ali
MD
Houston, TX
Dr. Poonam Awatramani
MD
Houston, TX
Dr. Kashi Bagri
MD
Beaumont, TX
Dr. Kimberly Benavente
M.D.
San Antonio, TX

Compare Geriatric Psychiatry Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is Ellen Fan, M.D.'s specialty? ▼
Ellen Fan, M.D. specializes in Geriatric Psychiatry Physician and practices in Plano, Texas. Credentials: M.D..
How much does Ellen Fan, M.D. prescribe under Medicare Part D? ▼
In 2024, Ellen Fan, M.D. wrote 776 Medicare Part D claims totaling $25K in drug costs for 88 beneficiaries.
What is Ellen Fan, M.D.'s Medicare quality score? ▼
Ellen Fan, M.D. has a CMS MIPS Final Score of 100/100 (Quality: 95). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Ellen Fan, M.D. located? ▼
Ellen Fan, M.D. is located at 3308 PRESTON RD, Plano, TX, 75093. Phone: (972) 769-8572.
What is Ellen Fan, M.D.'s NPI number? ▼
Ellen Fan, M.D.'s National Provider Identifier (NPI) is 1134153646, issued on 07/10/2006.
Does Ellen Fan, M.D. prescribe more brand-name or generic drugs? ▼
Ellen Fan, M.D.'s prescribing is 2% brand-name and 98% generic drugs by claim count, with $8K in brand drug costs.
How many Geriatric Psychiatry Physician providers are there in the US? ▼
There are 787 Geriatric Psychiatry Physician providers across 46 states in the US. The average Geriatric Psychiatry Physician provider writes 1,586 Medicare Part D claims per year.
What drugs does Ellen Fan, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Ellen Fan, M.D.'s most frequently prescribed drugs include Quetiapine Fumarate, Escitalopram Oxalate, Clonazepam. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ellen Fan, M.D. accept Medicare? ▼
Ellen Fan, M.D. appears in CMS Medicare data with 776 Part D claims and 88 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ellen Fan, M.D.'s credentials? ▼
Ellen Fan, M.D.'s NPI is 1134153646 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

View source datasets and methodology notes
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 (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
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 August 2026 (NPPES) / 2024 (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

Compiled from official public sources by the editorial process.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.