NPI registry status
Active
2026 NPPES data Addiction Medicine (Internal Medicine) Physician NPI 1114981065 M.D.
Verify on CMS → Alan Geringer, M.D.
Addiction Medicine (Internal 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 553 in Addiction Medicine (Internal 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
940
Medicare Part D claims · 250 beneficiaries · Addiction Medicine (Internal Medicine) Physician avg: 1K
Generic prescribing
82%
generic claims · 18% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$38.98
2 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Alan Geringer, M.D. filed 940 Medicare Part D claims in 2023 as an Addiction Medicine (Internal Medicine) Physician in Baltimore, Maryland, prescribing 82% generic.
- 940
- Part D claims, 2023
- 82%
- generic prescribing
- $38.98
- industry payments (Sunshine Act)
- ≥75th
- 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.
Alan Geringer, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
940 ≥ 75th percentile 75% 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)
Alan Geringer, 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 Alan Geringer, M.D.?
Quality data not reportedPrimary specialty
Addiction Medicine (Internal Medicine) Physician
Medicare Part D claims
940 33% vs specialty avg
Specialty distribution in Maryland
How Addiction Medicine (Internal 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 Addiction Medicine (Internal 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).
Alan Geringer, M.D. appears in the CMS NPPES registry as an Addiction Medicine (Internal Medicine) Physician provider holding M.D. credentials at 2500 W ROGERS AVE, Baltimore, MD, 21215, with a listed phone of (443) 970-3608. NPI 1114981065 was issued on 04/15/2006.
Medicare Part D records for calendar year 2023 show 940 prescription claims written by this provider, covering 250 Medicare beneficiaries and totaling roughly $192K in drug spend, split 18% brand-name and 82% generic by claim count.
Addiction Medicine (Internal Medicine) Physician is a narrow specialty nationwide, with 553 enrolled providers across 46 states and an average of 1,403 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 | 1114981065 |
|---|---|
| Specialty | Addiction Medicine (Internal Medicine) Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 04/15/2006 |
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 Alan Geringer, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$39
Largest payer
PROCEPT BioRobotics Corporation
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
Alan Geringer, M.D. - brand share 18.0%
Addiction Medicine (Internal Medicine) Physician average
18% brand-name claims vs 82% generic, on 940 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.
940
Total Claims
$192K
Total Drug Cost
250
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,787
- Total Day Supply
- 50,894
- Brand vs Generic
- 18% brand / 82% generic
- Brand Drug Cost
- $133K
- Generic Drug Cost
- $59K
- Antibiotic Claims
- 77
Patient Demographics
- Average Patient Age
- 74.2 years
- Avg HCC Risk Score
- 1.21
- Gender Split
- 13% female / 87% male
- Age Distribution
- <65: 16, 65-74: 119, 75-84: 93, 85+: 22
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Alan Geringer, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Tamsulosin Hcl
Tamsulosin Hcl
302 claims
- Finasteride 112
Finasteride
112 claims
- Buprenorphine-Nalo… 103
Buprenorphine-Naloxone
103 claims
- Myrbetriq 77
Myrbetriq
77 claims
- Ciprofloxacin Hcl 49
Ciprofloxacin Hcl
49 claims
- Suboxone 41
Suboxone
41 claims
- Oxybutynin Chloride 37
Oxybutynin Chloride
37 claims
- Solifenacin Succin… 32
Solifenacin Succinate
32 claims
| Drug | Claims |
|---|---|
| Tamsulosin Hcl | 302 |
| Finasteride | 112 |
| Buprenorphine-Naloxone Buprenorphine Hcl/Naloxone Hcl | 103 |
| Myrbetriq Mirabegron | 77 |
| Ciprofloxacin Hcl | 49 |
| Suboxone Buprenorphine Hcl/Naloxone Hcl | 41 |
| Oxybutynin Chloride | 37 |
| Solifenacin Succinate | 32 |
| Testosterone | 19 |
| Gemtesa Vibegron | 16 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Addiction Medicine (Internal Medicine) Physician in MD →
All providers in Maryland →
Compare specialties →
Addiction Medicine (Internal Medicine) Physician Overview
How Alan Geringer, M.D. fits within the Addiction Medicine (Internal Medicine) Physician landscape nationally.
553
Addiction Medicine (Internal Medicine) Physician Providers in US
46
States with Addiction Medicine (Internal Medicine) Physician
1,403
Avg Claims per Provider
Alan Geringer, M.D.'s 940 claims are below the specialty average of 1,403.
Nearby Addiction Medicine (Internal Medicine) Physician Providers in Maryland
Other clinicians with the same primary specialty enrolled in Maryland, drawn from the same CMS NPPES roster as Geringer.
One of 14 Addiction Medicine (Internal Medicine) Physician providers enrolled in Maryland, 5 are shown here.
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 Maryland medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Addiction Medicine (Internal Medicine) 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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Medical Specialties Explained
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Understanding Medicare Claims Data
What prescribing data reveals about a provider
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How insurance networks affect your costs
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Frequently Asked Questions
What is Alan Geringer, M.D.'s specialty? ▼
Alan Geringer, M.D. specializes in Addiction Medicine (Internal Medicine) Physician and practices in Baltimore, Maryland. Credentials: M.D..
How much does Alan Geringer, M.D. prescribe under Medicare Part D? ▼
In 2023, Alan Geringer, M.D. wrote 940 Medicare Part D claims totaling $192K in drug costs for 250 beneficiaries.
Where is Alan Geringer, M.D. located? ▼
Alan Geringer, M.D. is located at 2500 W ROGERS AVE, Baltimore, MD, 21215. Phone: (443) 970-3608.
What is Alan Geringer, M.D.'s NPI number? ▼
Alan Geringer, M.D.'s National Provider Identifier (NPI) is 1114981065, issued on 04/15/2006.
Does Alan Geringer, M.D. prescribe more brand-name or generic drugs? ▼
Alan Geringer, M.D.'s prescribing is 18% brand-name and 82% generic drugs by claim count, with $133K in brand drug costs.
How many Addiction Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 553 Addiction Medicine (Internal Medicine) Physician providers across 46 states in the US. The average Addiction Medicine (Internal Medicine) Physician provider writes 1,403 Medicare Part D claims per year.
What drugs does Alan Geringer, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Alan Geringer, M.D.'s most frequently prescribed drugs include Tamsulosin Hcl, Finasteride, Buprenorphine-Naloxone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Alan Geringer, M.D. accept Medicare? ▼
Alan Geringer, M.D. appears in CMS Medicare data with 940 Part D claims and 250 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Alan Geringer, M.D.'s credentials? ▼
Alan Geringer, M.D.'s NPI is 1114981065 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.