NPI registry status
Active
2026 NPPES data Adult Medicine Physician NPI 1740272525 M.D.
Verify on CMS → Leonard Zullo, M.D.
Adult Medicine 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 2,481 in Adult Medicine 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
40
Medicare Part D claims · Adult Medicine Physician avg: 3K
What the federal data shows
Leonard Zullo, M.D. filed 40 Medicare Part D claims in 2023 as an Adult Medicine Physician in Baltimore, Maryland.
- 40
- Part D claims, 2023
- ≥0th
- pct by Part D claim volume (lower-bound band)
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 Leonard Zullo, M.D.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1740272525), first enumerated 08/18/2005.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 40 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- 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 1740272525 · Adult Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-TRACE · BOOK-THIN · PHOTO-ENUM
- NPI-10 1740272525
- ENUM-LEGACY 2005
- TAX-NARROW 2,481
- RX-TRACE 40
- BOOK-THIN 65 in Maryland
- PHOTO-ENUM Sakuntalai Srinantha… · 2005
Leonard Zullo, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
40 ≥ 0th percentile 0% of 1,370,886 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. 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 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Leonard Zullo, M.D. 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).
What does the federal data show about Leonard Zullo, M.D.?
Quality data not reportedPrimary specialty
Adult Medicine Physician
Medicare Part D claims
40 99% vs specialty avg
Specialty distribution in Maryland
How Adult Medicine Physician compares to other specialties among Maryland providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Adult Medicine Physician. Verify directly:
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
Provider Details
| NPI | 1740272525 |
|---|---|
| Specialty | Adult Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 08/18/2005 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
40
Total Claims
$834
Total Drug Cost
N/A
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 97
- Total Day Supply
- 2,912
- Generic Drug Cost
- $597
Patient Demographics
- Average Patient Age
- 76.3 years
- Avg HCC Risk Score
- 0.82
Adult Medicine Physician Overview
How Leonard Zullo, M.D. fits within the Adult Medicine Physician landscape nationally.
2,481
Adult Medicine Physician Providers in US
52
States with Adult Medicine Physician
2,807
Avg Claims per Provider
Leonard Zullo, M.D.'s 40 claims are below the specialty average of 2,807.
Nationwide Adult Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Zullo, both outside Maryland so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2005)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Adult Medicine Physician Providers in Maryland
Other clinicians with the same primary specialty enrolled in Maryland, drawn from the same CMS NPPES roster as Zullo.
One of 65 Adult Medicine Physician providers enrolled in Maryland, 5 are shown here.
Franklin Addison
Baltimore, MD
Dr. Folake Adeyemi
CRNP
Laurel, MD
Dr. Abisola Alade
CRNP
Randallstown, MD
Dr. Idongesit Attang
M.D.
Largo, MD
Dr. Kamakshi Baig
M.D
White Plains, MD
Compare Adult Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Leonard Zullo, M.D.'s specialty? ▼
Leonard Zullo, M.D. specializes in Adult Medicine Physician and practices in Baltimore, Maryland. Credentials: M.D..
How much does Leonard Zullo, M.D. prescribe under Medicare Part D? ▼
In 2023, Leonard Zullo, M.D. wrote 40 Medicare Part D claims totaling $834 in drug costs for N/A beneficiaries.
Where is Leonard Zullo, M.D. located? ▼
Leonard Zullo, M.D. is located at 1665 MERRITT BLVD, Baltimore, MD, 21222. Phone: (410) 282-5330.
What is Leonard Zullo, M.D.'s NPI number? ▼
Leonard Zullo, M.D.'s National Provider Identifier (NPI) is 1740272525, issued on 08/18/2005.
How many Adult Medicine Physician providers are there in the US? ▼
There are 2,481 Adult Medicine Physician providers across 52 states in the US. The average Adult Medicine Physician provider writes 2,807 Medicare Part D claims per year.
Does Leonard Zullo, M.D. accept Medicare? ▼
Leonard Zullo, M.D. appears in CMS Medicare data with 40 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Leonard Zullo, M.D.'s credentials? ▼
Leonard Zullo, M.D.'s NPI is 1740272525 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.
- 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
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.