2026 NPPES data Maternal & Fetal Medicine Physician NPI 1639705635 MD
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ALEXANDER HARRISON, MD

Maternal & Fetal Medicine Physician in LEXINGTON, Kentucky. 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
97
Medicare Part D claims · 38 beneficiaries · Maternal & Fetal Medicine Physician avg: 75
Generic prescribing
69%
generic claims · 31% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$9.6
1 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: ALEXANDER HARRISON, MD is a Maternal & Fetal Medicine Physician ([object Object]) practicing in LEXINGTON, Kentucky with a Medicare Part D prescribing footprint of 97 claims across 38 beneficiaries — 31% brand-name prescribing . Industry payments of $9.6 across 1 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: ALEXANDER HARRISON, MD filed 97 Medicare Part D claims in 2023 across LEXINGTON, Kentucky. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

ALEXANDER HARRISON, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

ALEXANDER HARRISON, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 03/21/2020

NPI 1639705635

Primary specialty

Maternal & Fetal Medicine Physician

Niche

2,103 US NPIs in this specialty

Medicare Part D claims

97 29% vs specialty avg

2023 prescription claims

Specialty avg: 75

Specialty distribution in Kentucky

How Maternal & Fetal Medicine Physician compares to other specialties among Kentucky providers

Kentucky providers

Maternal & Fetal Medicine Physician share within Kentucky

1. Maternal & Fetal Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Maternal & Fetal Medicine Physician share within Kentucky

Specialty board-certification context

Estimated specialty board-certified rate — Maternal & Fetal Medicine Physician (ABMS / AOA reference)

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

Est. board-certified rate (Maternal & Fetal Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Maternal & Fetal 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 HARRISON, MD is a Maternal & Fetal Medicine Physician provider practicing in LEXINGTON, Kentucky, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1639705635. 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 HARRISON, MD appears in the CMS NPPES registry as a Maternal & Fetal Medicine Physician provider holding MD credentials at 800 ROSE ST, LEXINGTON, KY, 40536, with a listed phone of (859) 323-0005. NPI 1639705635 was issued on 03/21/2020. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what HARRISON 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 97 prescription claims written by this provider, covering 38 Medicare beneficiaries and totaling roughly $16K in drug spend, split 31% brand-name and 69% generic by claim count, with an opioid prescribing rate of 19.6%. 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.

Maternal & Fetal Medicine Physician is a narrow specialty nationwide, with 2,103 enrolled providers across 52 states and an average of 75 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

800 ROSE ST
LEXINGTON, KY 40536

Provider Details

NPI 1639705635
Specialty Maternal & Fetal Medicine Physician
Credentials MD
Gender Male
NPI Issued 03/21/2020

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for ALEXANDER HARRISON, MD. Source: openpaymentsdata.cms.gov.

Total received

$10

Largest payer

Organon Llc

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

Brand vs generic prescribing mix · Above average

ALEXANDER HARRISON, MD — brand share 31.0%
Specialty average (est.)

31% brand-name claims vs 69% generic, on 97 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.

97
Total Claims
$16K
Total Drug Cost
38
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
106
Total Day Supply
1,880
Brand vs Generic
31% brand / 69% generic
Brand Drug Cost
$15K
Generic Drug Cost
$867
Opioid Claims
19 (19.6% rate)

Patient Demographics

Average Patient Age
62.6 years
Avg HCC Risk Score
1.28
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.

Drug Claims
Oxycodone Hcl
19
Ondansetron Hcl
15
Ibuprofen
12
Premarin
"Estrogens
N/A

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

Maternal & Fetal Medicine Physician Overview

How ALEXANDER HARRISON, MD fits within the Maternal & Fetal Medicine Physician landscape nationally.

2,103
Maternal & Fetal Medicine Physician Providers in US
52
States with Maternal & Fetal Medicine Physician
75
Avg Claims per Provider

ALEXANDER HARRISON, MD's 97 claims are above the specialty average of 75.

Nearby Maternal & Fetal Medicine Physician Providers in Kentucky

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

Compare Maternal & Fetal Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is ALEXANDER HARRISON, MD's specialty?
ALEXANDER HARRISON, MD specializes in Maternal & Fetal Medicine Physician and practices in LEXINGTON, Kentucky. Credentials: MD.
How much does ALEXANDER HARRISON, MD prescribe under Medicare Part D?
In 2023, ALEXANDER HARRISON, MD wrote 97 Medicare Part D claims totaling $16K in drug costs for 38 beneficiaries.
Where is ALEXANDER HARRISON, MD located?
ALEXANDER HARRISON, MD is located at 800 ROSE ST, LEXINGTON, KY, 40536. Phone: (859) 323-0005.
What is ALEXANDER HARRISON, MD's NPI number?
ALEXANDER HARRISON, MD's National Provider Identifier (NPI) is 1639705635, issued on 03/21/2020.
Does ALEXANDER HARRISON, MD prescribe more brand-name or generic drugs?
ALEXANDER HARRISON, MD's prescribing is 31% brand-name and 69% generic drugs by claim count, with $15K in brand drug costs.
Does ALEXANDER HARRISON, MD prescribe opioids?
Yes, ALEXANDER HARRISON, MD had 19 opioid claims in 2023 with an opioid prescribing rate of 19.6%.
How many Maternal & Fetal Medicine Physician providers are there in the US?
There are 2,103 Maternal & Fetal Medicine Physician providers across 52 states in the US. The average Maternal & Fetal Medicine Physician provider writes 75 Medicare Part D claims per year.
What drugs does ALEXANDER HARRISON, MD prescribe most often?
Based on 2023 Medicare Part D data, ALEXANDER HARRISON, MD's most frequently prescribed drugs include Oxycodone Hcl, Ondansetron Hcl, Ibuprofen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ALEXANDER HARRISON, MD accept Medicare?
ALEXANDER HARRISON, MD appears in CMS Medicare data with 97 Part D claims and 38 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ALEXANDER HARRISON, MD's credentials?
ALEXANDER HARRISON, MD's NPI is 1639705635 with credentials MD. 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