2026 NPPES data Neurology Physician NPI 1255335949 MD
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LEO D'AMBROSIO, MD

Neurology Physician in INDIANAPOLIS, Indiana. 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
4K
Medicare Part D claims · 488 beneficiaries · Neurology Physician avg: 1K
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
76.7426/100
▼ 6 pts below national avg 83.1 · [object Object]
Industry payments
$4.1K
207 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: LEO D'AMBROSIO, MD is a Neurology Physician ([object Object]) practicing in INDIANAPOLIS, Indiana with a Medicare Part D prescribing footprint of 4K claims across 488 beneficiaries — 12% brand-name prescribing . Their CMS MIPS Final Score of 76.7426/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities . Industry payments of $4.1K across 207 transactions are disclosed under CMS Open Payments (Sunshine Act).

What the federal data shows

LEO D'AMBROSIO, MD reported a CMS MIPS final score of 76.7426/100 — below the 83.1 national average — and filed 3,867 Medicare Part D claims in 2023.

76.7426/100
MIPS score · -6 vs avg
4K
Part D claims, 2023
88%
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.

LEO D'AMBROSIO, MD's MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023 — the federal quality measure

77 21st percentile higher than 21% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). This entry sits in this band. 80–90: 129,887 scored providers (27%). Above this entry. 90–100: 189,403 scored providers (40%). Above this entry. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored 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.

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

Board certification likely (heuristic — not verified)

LEO D'AMBROSIO, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

LEO D'AMBROSIO, MD at a glance

Below national average

NPI registry status

Active

Issued 06/09/2005

NPI 1255335949

Primary specialty

Neurology Physician

Mid-sized

19,866 US NPIs in this specialty

Medicare Part D claims

3,867 195% vs specialty avg

2023 prescription claims

Specialty avg: 1,309

MIPS final score

76.7426/100 6.357399999999998% pts

Above neutral band

vs 83.1 national avg

Specialty distribution in Indiana

How Neurology Physician compares to other specialties among Indiana providers

Indiana providers

Neurology Physician share within Indiana

1. Neurology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Neurology Physician share within Indiana

Medicare quality performance — MIPS

LEO D'AMBROSIO, MD's 2023 MIPS final score plotted against the Neurology Physician national average

Below national average
MIPS Final Score
76.7426/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Neurology Physician) — 76.7426/100 vs national avg 83.1

0%100%National avg83%76.7%
MIPS final score (Neurology Physician) — 76.7426/100 vs national avg 83.1

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).

LEO D'AMBROSIO, MD is a Neurology Physician provider practicing in INDIANAPOLIS, Indiana, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1255335949. 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.

LEO D'AMBROSIO, MD appears in the CMS NPPES registry as a Neurology Physician provider holding MD credentials at 8051 S EMERSON AVE STE 350, INDIANAPOLIS, IN, 46237, with a listed phone of (317) 859-1020. NPI 1255335949 was issued on 06/09/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what D'AMBROSIO 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 3,867 prescription claims written by this provider, covering 488 Medicare beneficiaries and totaling roughly $2.2 million in drug spend, split 12% brand-name and 88% generic by claim count, with an opioid prescribing rate of 5.0%. 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. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 76.7426/100 for the 2023 performance year (Quality 63.4503, Cost 64.2394), compared with the national average of 83.1.

Neurology Physician is a mid-sized specialty nationwide, with 19,866 enrolled providers across 54 states and an average of 1,309 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

8051 S EMERSON AVE STE 350
INDIANAPOLIS, IN 46237

Provider Details

NPI 1255335949
Specialty Neurology Physician
Credentials MD
Gender Male
NPI Issued 06/09/2005

CMS Quality Score (MIPS)

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

76.7426
Final Score
Avg: 83.1
63.4503
Quality
64.2394
Cost
89
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where LEO D'AMBROSIO, MD 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.

JOSEPHSON-WALLACK-MUNSHOWER NEUROLOGY PC
INDIANAPOLIS, IN

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

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 LEO D'AMBROSIO, MD. Source: openpaymentsdata.cms.gov.

Total received

$4.1K

Largest payer

MDD US Operations, 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 · Typical

LEO D'AMBROSIO, MD — brand share 12.0%
Specialty average (est.)

12% brand-name claims vs 88% generic, on 3,867 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.

3,867
Total Claims
$2.2M
Total Drug Cost
488
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
6,501
Total Day Supply
191,108
Brand vs Generic
12% brand / 88% generic
Brand Drug Cost
$1.9M
Generic Drug Cost
$331K
Opioid Claims
194 (5.0% rate)

Patient Demographics

Average Patient Age
69.0 years
Avg HCC Risk Score
1.57
Gender Split
57% female / 43% male
Age Distribution
<65: 139, 65-74: 169, 75-84: 139, 85+: 41

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Donepezil Hcl
239
Levetiracetam
232
Topiramate
183
Carbidopa-Levodopa
Carbidopa/Levodopa
170
Gabapentin
140
Pregabalin
121
Clonazepam
108
Lamotrigine
105
Amantadine
Amantadine Hcl
101
Lacosamide
101

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

Neurology Physician Overview

How LEO D'AMBROSIO, MD fits within the Neurology Physician landscape nationally.

19,866
Neurology Physician Providers in US
54
States with Neurology Physician
1,309
Avg Claims per Provider

LEO D'AMBROSIO, MD's 3,867 claims are above the specialty average of 1,309.

Nearby Neurology Physician Providers in Indiana

Other clinicians with the same primary specialty enrolled in Indiana, drawn from the same CMS NPPES roster as D'AMBROSIO.

Compare Neurology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is LEO D'AMBROSIO, MD's specialty?
LEO D'AMBROSIO, MD specializes in Neurology Physician and practices in INDIANAPOLIS, Indiana. Credentials: MD.
How much does LEO D'AMBROSIO, MD prescribe under Medicare Part D?
In 2023, LEO D'AMBROSIO, MD wrote 3,867 Medicare Part D claims totaling $2.2M in drug costs for 488 beneficiaries.
What is LEO D'AMBROSIO, MD's Medicare quality score?
LEO D'AMBROSIO, MD has a CMS MIPS Final Score of 76.7426/100 (Quality: 63.4503, Cost: 64.2394). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is LEO D'AMBROSIO, MD located?
LEO D'AMBROSIO, MD is located at 8051 S EMERSON AVE STE 350, INDIANAPOLIS, IN, 46237. Phone: (317) 859-1020.
What is LEO D'AMBROSIO, MD's NPI number?
LEO D'AMBROSIO, MD's National Provider Identifier (NPI) is 1255335949, issued on 06/09/2005.
Does LEO D'AMBROSIO, MD prescribe more brand-name or generic drugs?
LEO D'AMBROSIO, MD's prescribing is 12% brand-name and 88% generic drugs by claim count, with $1.9M in brand drug costs.
Does LEO D'AMBROSIO, MD prescribe opioids?
Yes, LEO D'AMBROSIO, MD had 194 opioid claims in 2023 with an opioid prescribing rate of 5.0%.
How many Neurology Physician providers are there in the US?
There are 19,866 Neurology Physician providers across 54 states in the US. The average Neurology Physician provider writes 1,309 Medicare Part D claims per year.
What drugs does LEO D'AMBROSIO, MD prescribe most often?
Based on 2023 Medicare Part D data, LEO D'AMBROSIO, MD's most frequently prescribed drugs include Donepezil Hcl, Levetiracetam, Topiramate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does LEO D'AMBROSIO, MD accept Medicare?
LEO D'AMBROSIO, MD appears in CMS Medicare data with 3,867 Part D claims and 488 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify LEO D'AMBROSIO, MD's credentials?
LEO D'AMBROSIO, MD's NPI is 1255335949 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.
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