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2026 NPPES data Obstetrics & Gynecology Physician NPI 1548254246 M.D.
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Hsiao-Hui Lin, M.D.

Obstetrics & Gynecology Physician in Baltimore, Maryland.

This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 44,326 in Obstetrics & Gynecology 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
416
Medicare Part D claims · 129 beneficiaries · Obstetrics & Gynecology Physician avg: 179
Generic prescribing
80%
generic claims · 20% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
52.2/100
▼ 31 pts below national avg 83.5 · Mid-tier
Verify NPI on CMS Methodology
Compiled from official public sources by the editorial process.

What the federal data shows

Hsiao-Hui Lin, M.D. reported a CMS MIPS final score of 52.2/100 - below the 83.5 national average - and filed 416 Medicare Part D claims in 2023.

52.2/100
MIPS score · -31 vs avg
416
Part D claims, 2023
80%
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.

CMS NPPES provider registry desk

NPI 1548254246 · Obstetrics & Gynecology Physician

NPI-10 · ENUM-LEGACY · TAX-MID · MIPS-LOW · RX-LIGHT · BOOK-LIGHT · PHOTO-FINISH

  • NPI-10 1548254246
  • ENUM-LEGACY 2005
  • TAX-MID 44K Obstetrics &
  • MIPS-LOW 52.2/100
  • RX-LIGHT 416
  • BOOK-LIGHT 1,006 in Maryland
  • PHOTO-FINISH Urenna Acholonu · ±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

Hsiao-Hui Lin, 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.

52 ≥ 5th percentile 5% 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%). This entry sits in this band. 60–70: 13,906 measured providers (3%). Above this entry. 70–80: 94,570 measured providers (21%). Above this entry. 80–90: 129,887 measured providers (29%). Above this entry. 90+: 189,403 measured providers (42%). Above this entry. 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 Hsiao-Hui Lin, M.D. sits

This provider among obstetrics & gynecology physician peers

Across the 7,360 obstetrics & gynecology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Hsiao-Hui Lin, M.D. writes more Part D claims than 90% of them and scores higher on MIPS quality than 1% - placing this provider in the high-volume, lower-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 quality02550751000255075100Part D claim volume, percentile in specialtyMIPS quality, percentilePoint, Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 25Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 40Point, Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 48Point, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 60Point, Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 78Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 8Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 77Point, Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 25Point, Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 25Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 7Point, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 97Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 12Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 97Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 47Point, Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 58Point, Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 37Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 20Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 80Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 75Point, Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 63Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 95Point, Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 53Point, Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 12Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 35Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 68Point, Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 17Point, Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 97Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 57Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 18Point, Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 5Point, Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 88Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 67Hsiao-Hui Lin, M.D., Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 1
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one obstetrics & gynecology physician peer from a representative sample of 60; the gold marker is Hsiao-Hui Lin, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

✓
Board certification likely (heuristic, not verified)

Hsiao-Hui Lin, 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 Hsiao-Hui Lin, M.D.?

Below national average

NPI registry status

Active

Issued 09/08/2005

NPI 1548254246

Primary specialty

Obstetrics & Gynecology Physician

Mid-sized

44,326 US NPIs in this specialty

Medicare Part D claims

416 132% vs specialty avg

2023 prescription claims

Specialty avg: 179

MIPS final score

52.2/100 31.3 pts vs avg

Mid-tier band

vs 83.5 national avg

Specialty distribution in Maryland

How Obstetrics & Gynecology Physician compares to other specialties among Maryland providers

Maryland providers
Behavior Technician14.1%Clinical Social Worker5.5%Student in an Organized Heal…4.5%Home Health Aide4.4%Physical Therapist3.9%Pharmacist3.6%Obstetrics & Gynecology Phys…0.7%
Largest specialties in Maryland (% of in-state providers)

Medicare quality performance, MIPS

Hsiao-Hui Lin, M.D.'s 2023 MIPS final score plotted against the Obstetrics & Gynecology Physician national average

Below national average
MIPS Final Score
52.2/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%52.2%
MIPS final score (Obstetrics & Gynecology Physician) - 52.2/100 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

6565 N CHARLES ST
Baltimore, MD 21204
(410) 494-1917

Provider Details

NPI 1548254246
Specialty Obstetrics & Gynecology Physician
Credentials M.D.
Gender Female
NPI Issued 09/08/2005

CMS Quality Score (MIPS)

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

52.1583
Final Score
Measured-score avg: 83.5
14.2857
Quality
53.742
Cost
67
Promoting Interoperability

Reporting: Group practice

Brand vs generic prescribing mix · Typical

Hsiao-Hui Lin, M.D. - brand share 20.0%
Obstetrics & Gynecology Physician average

20% brand-name claims vs 80% generic, on 416 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.

416
Total Claims
$41K
Total Drug Cost
129
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
846
Total Day Supply
22,883
Brand vs Generic
20% brand / 80% generic
Brand Drug Cost
$23K
Generic Drug Cost
$18K
Antibiotic Claims
42

Patient Demographics

Average Patient Age
71.0 years
Avg HCC Risk Score
0.62
Gender Split
100% female / 0% male

Top Prescribed Drugs (Medicare Part D)

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

What Hsiao-Hui Lin, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Estradiol
 78
Betamethasone Valerate
 29
Valacyclovir
Valacyclovir Hcl
26
Ciprofloxacin Hcl
 21
Hydrocortisone
 19
Clotrimazole-Betamethasone
Clotrimazole/Betamethasone Dip
17
Alendronate Sodium
 16
Estradiol (Twice Weekly)
Estradiol
15
Terconazole
 13
Zolpidem Tartrate
 13

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

More Obstetrics & Gynecology Physician in MD → All providers in Maryland → Compare specialties →

Obstetrics & Gynecology Physician Overview

How Hsiao-Hui Lin, M.D. fits within the Obstetrics & Gynecology Physician landscape nationally.

44,326
Obstetrics & Gynecology Physician Providers in US
56
States with Obstetrics & Gynecology Physician
179
Avg Claims per Provider

Hsiao-Hui Lin, M.D.'s 416 claims are above the specialty average of 179.

Nationwide Obstetrics & Gynecology Physician peers with similar MIPS or enrollment year

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

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (52.2 here).

Urenna Acholonu 52.2 FL David Afram 52.2 VA Syeda Alam 52.2 PA Jane Allen 52.2 VA

Same NPPES enumeration year (2005)

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

Lon Taff Sacramento, CA Peter Tah Clifton, NJ Craig Syrop Iowa City, IA Louis Fernandez Toccoa, GA

Nearby Obstetrics & Gynecology Physician Providers in Maryland

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

One of 1,006 Obstetrics & Gynecology Physician providers enrolled in Maryland, 5 are shown here.

Fouad Abbas
Baltimore, MD
Dr. Alexandra Abbate
MD
Baltimore, MD
Dr. Basma Abdo
M.D
Baltimore, MD
Dr. Tolani Abdulkadir
MD
Baltimore, MD
Dr. Sozdar Abed
MD
Easton, MD

Compare Obstetrics & Gynecology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is Hsiao-Hui Lin, M.D.'s specialty? ▼
Hsiao-Hui Lin, M.D. specializes in Obstetrics & Gynecology Physician and practices in Baltimore, Maryland. Credentials: M.D..
How much does Hsiao-Hui Lin, M.D. prescribe under Medicare Part D? ▼
In 2023, Hsiao-Hui Lin, M.D. wrote 416 Medicare Part D claims totaling $41K in drug costs for 129 beneficiaries.
What is Hsiao-Hui Lin, M.D.'s Medicare quality score? ▼
Hsiao-Hui Lin, M.D. has a CMS MIPS Final Score of 52.2/100 (Quality: 14.3, Cost: 53.7). 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 Hsiao-Hui Lin, M.D. located? ▼
Hsiao-Hui Lin, M.D. is located at 6565 N CHARLES ST, Baltimore, MD, 21204. Phone: (410) 494-1917.
What is Hsiao-Hui Lin, M.D.'s NPI number? ▼
Hsiao-Hui Lin, M.D.'s National Provider Identifier (NPI) is 1548254246, issued on 09/08/2005.
Does Hsiao-Hui Lin, M.D. prescribe more brand-name or generic drugs? ▼
Hsiao-Hui Lin, M.D.'s prescribing is 20% brand-name and 80% generic drugs by claim count, with $23K in brand drug costs.
How many Obstetrics & Gynecology Physician providers are there in the US? ▼
There are 44,326 Obstetrics & Gynecology Physician providers across 56 states in the US. The average Obstetrics & Gynecology Physician provider writes 179 Medicare Part D claims per year.
What drugs does Hsiao-Hui Lin, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Hsiao-Hui Lin, M.D.'s most frequently prescribed drugs include Estradiol, Betamethasone Valerate, Valacyclovir. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Hsiao-Hui Lin, M.D. accept Medicare? ▼
Hsiao-Hui Lin, M.D. appears in CMS Medicare data with 416 Part D claims and 129 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Hsiao-Hui Lin, M.D.'s credentials? ▼
Hsiao-Hui Lin, M.D.'s NPI is 1548254246 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 (2023). 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 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

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 May 2026.