NPI registry status
Active
2026 NPPES data Infectious Disease Physician NPI 1366443855 M.D.
Verify on CMS → Mark Gilbert, M.D.
Infectious Disease Physician in Darby, Pennsylvania.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 8,292 in Infectious Disease 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
108
Medicare Part D claims · 24 beneficiaries · Infectious Disease Physician avg: 816
MIPS score
47/100
▼ 36 pts below national avg 83.1 · Below average
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Mark Gilbert, M.D. reported a CMS MIPS final score of 47/100 - below the 83.1 national average - and filed 108 Medicare Part D claims in 2023.
- 47/100
- MIPS score · -36 vs avg
- 108
- Part D claims, 2023
- 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.
Mark Gilbert, M.D.'s MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
47 4th percentile higher than 4% of 477,587 scored providers
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
Where Mark Gilbert, M.D. sits
This provider among infectious disease physician peers
Across the 2,276 infectious disease physician providers who report both Medicare Part D prescribing and a MIPS quality score, Mark Gilbert, M.D. writes more Part D claims than 18% of them and scores higher on MIPS quality than 4% - placing this provider in the lower-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one infectious disease physician peer from a representative sample of 60; the gold marker is Mark Gilbert, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Mark Gilbert, M.D. 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).
What does the federal data show about Mark Gilbert, M.D.?
Below national averagePrimary specialty
Infectious Disease Physician
Medicare Part D claims
108 87% vs specialty avg
MIPS final score
47/100 36.1 pts vs avg
Specialty distribution in Pennsylvania
How Infectious Disease Physician compares to other specialties among Pennsylvania providers
Medicare quality performance, MIPS
Mark Gilbert, M.D.'s 2023 MIPS final score plotted against the Infectious Disease Physician national average
- MIPS Final Score
- 47/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Infectious Disease Physician) - 47/100 vs national avg 83.1
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).
Mark Gilbert, M.D. appears in the CMS NPPES registry as a Infectious Disease Physician provider holding M.D. credentials at 1503 LANSDOWNE AVE, Darby, PA, 19023, with a listed phone of (610) 237-5816. NPI 1366443855 was issued on 08/09/2005.
Medicare Part D records for calendar year 2023 show 108 prescription claims written by this provider, covering 24 Medicare beneficiaries and totaling roughly $14K in drug spend. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 47/100 for the 2023 performance year (Quality 64, Cost 48.3), compared with the national average of 83.1.
Infectious Disease Physician is a mid-sized specialty nationwide, with 8,292 enrolled providers across 54 states and an average of 816 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
Provider Details
| NPI | 1366443855 |
|---|---|
| Specialty | Infectious Disease Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 08/09/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
47.0041
Final Score
Avg: 83.1
63.9693
Quality
48.3027
Cost
Reporting: Individual
Hospital and facility affiliations
Facilities where Mark Gilbert, M.D. 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.
Infectious Diseases Medical Associates LLC
Darby, PA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - Pennsylvania PA-BOM 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 ~45K Pennsylvania medical licensees in 2023 - they are NOT specific to Mark Gilbert, M.D.. To verify Mark Gilbert, M.D.'s current license status, search the PA-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
133
Total board actions, Pennsylvania 2023
Across 129 cases
2.96
Actions per 1,000 licensees
Pennsylvania statewide rate
probation
Most common action type
48 cases
PA-BOM 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 Pennsylvania disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
108
Total Claims
$14K
Total Drug Cost
24
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 118
- Total Day Supply
- 1,202
- Generic Drug Cost
- $14K
- Antibiotic Claims
- 90
Patient Demographics
- Average Patient Age
- 70.5 years
- Avg HCC Risk Score
- 1.84
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Mark Gilbert, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Ceftriaxone
Ceftriaxone
21 claims
- Cefazolin Sodium
Cefazolin Sodium
15 claims
- Vancomycin Hcl
Vancomycin Hcl
15 claims
- Sodium Chloride
Sodium Chloride
12 claims
| Drug | Claims |
|---|---|
| Ceftriaxone Ceftriaxone Sodium | 21 |
| Cefazolin Sodium | 15 |
| Vancomycin Hcl | 15 |
| Sodium Chloride 0.9 % Sodium Chloride | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Infectious Disease Physician Overview
How Mark Gilbert, M.D. fits within the Infectious Disease Physician landscape nationally.
8,292
Infectious Disease Physician Providers in US
54
States with Infectious Disease Physician
816
Avg Claims per Provider
Mark Gilbert, M.D.'s 108 claims are below the specialty average of 816.
Nearby Infectious Disease Physician Providers in Pennsylvania
Other clinicians with the same primary specialty enrolled in Pennsylvania, drawn from the same CMS NPPES roster as Gilbert.
Dr. Rasha Abdulmassih
MD
Pittsburgh, PA
Dr. David Abel
D.O.
Lancaster, PA
Dr. Monica Ahuja
MD
Wilkes Barre, PA
Dr. Nancy Aitcheson
MD
Philadelphia, PA
Dr. Okan Akay
M.D.
Harrisburg, PA
Compare Infectious Disease Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Pennsylvania medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Infectious Disease Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Mark Gilbert, M.D.'s specialty? ▼
Mark Gilbert, M.D. specializes in Infectious Disease Physician and practices in Darby, Pennsylvania. Credentials: M.D..
How much does Mark Gilbert, M.D. prescribe under Medicare Part D? ▼
In 2023, Mark Gilbert, M.D. wrote 108 Medicare Part D claims totaling $14K in drug costs for 24 beneficiaries.
What is Mark Gilbert, M.D.'s Medicare quality score? ▼
Mark Gilbert, M.D. has a CMS MIPS Final Score of 47/100 (Quality: 64, Cost: 48.3). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Mark Gilbert, M.D. located? ▼
Mark Gilbert, M.D. is located at 1503 LANSDOWNE AVE, Darby, PA, 19023. Phone: (610) 237-5816.
What is Mark Gilbert, M.D.'s NPI number? ▼
Mark Gilbert, M.D.'s National Provider Identifier (NPI) is 1366443855, issued on 08/09/2005.
How many Infectious Disease Physician providers are there in the US? ▼
There are 8,292 Infectious Disease Physician providers across 54 states in the US. The average Infectious Disease Physician provider writes 816 Medicare Part D claims per year.
What drugs does Mark Gilbert, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Mark Gilbert, M.D.'s most frequently prescribed drugs include Ceftriaxone, Cefazolin Sodium, Vancomycin Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mark Gilbert, M.D. accept Medicare? ▼
Mark Gilbert, M.D. appears in CMS Medicare data with 108 Part D claims and 24 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mark Gilbert, M.D.'s credentials? ▼
Mark Gilbert, M.D.'s NPI is 1366443855 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 PlainDoctor editorial team.