NPI registry status
Active
2026 NPPES data Nephrology Physician NPI 1922141241 M.D.
Verify on CMS → Ajay Kumar, M.D.
Nephrology Physician in Columbia, 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 10,569 in Nephrology 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
246
Medicare Part D claims · 56 beneficiaries · Nephrology Physician avg: 1K
Generic prescribing
73%
generic claims · 27% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$46.09
3 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Ajay Kumar, M.D. filed 246 Medicare Part D claims in 2023 as a Nephrology Physician in Columbia, Maryland, prescribing 73% generic.
- 246
- Part D claims, 2023
- 73%
- 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.
Ajay Kumar, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
246 49th percentile higher than 49% of 1,370,886 prescribers
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.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Ajay Kumar, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 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 Ajay Kumar, M.D.?
Quality data not reportedPrimary specialty
Nephrology Physician
Medicare Part D claims
246 83% vs specialty avg
Specialty distribution in Maryland
How Nephrology 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 Nephrology 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).
Ajay Kumar, M.D. appears in the CMS NPPES registry as a Nephrology Physician provider holding M.D. credentials at 5999 HARPERS FARM RD STE W250, Columbia, MD, 21044, with a listed phone of (410) 772-8822. NPI 1922141241 was issued on 02/15/2007.
Medicare Part D records for calendar year 2023 show 246 prescription claims written by this provider, covering 56 Medicare beneficiaries and totaling roughly $49K in drug spend, split 27% brand-name and 73% generic by claim count.
Nephrology Physician is a mid-sized specialty nationwide, with 10,569 enrolled providers across 55 states and an average of 1,454 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 | 1922141241 |
|---|---|
| Specialty | Nephrology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 02/15/2007 |
Hospital and facility affiliations
Facilities where Ajay Kumar, 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.
Mid-Atlantic Nephrology Associates PA
Laurel, MD
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 Ajay Kumar, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$46
Largest payer
Boehringer Ingelheim Pharmaceuticals, Inc.
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
Ajay Kumar, M.D. - brand share 27.0%
Nephrology Physician average
27% brand-name claims vs 73% generic, on 246 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.
246
Total Claims
$49K
Total Drug Cost
56
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 465
- Total Day Supply
- 13,110
- Brand vs Generic
- 27% brand / 73% generic
- Brand Drug Cost
- $45K
- Generic Drug Cost
- $4K
Patient Demographics
- Average Patient Age
- 72.3 years
- Avg HCC Risk Score
- 4.42
- Gender Split
- 54% female / 46% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Ajay Kumar, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Lokelma
Lokelma
29 claims
- Amlodipine Besylate
Amlodipine Besylate
21 claims
- Doxazosin Mesylate
Doxazosin Mesylate
20 claims
- Farxiga
Farxiga
17 claims
- Nifedipine Er
Nifedipine Er
17 claims
- Hydrochlorothiazide
Hydrochlorothiazide
13 claims
- Lisinopril
Lisinopril
13 claims
- Methylprednisolone
Methylprednisolone
13 claims
| Drug | Claims |
|---|---|
| Lokelma Sodium Zirconium Cyclosilicate | 29 |
| Amlodipine Besylate | 21 |
| Doxazosin Mesylate | 20 |
| Farxiga Dapagliflozin Propanediol | 17 |
| Nifedipine Er Nifedipine | 17 |
| Hydrochlorothiazide | 13 |
| Lisinopril | 13 |
| Methylprednisolone | 13 |
| Losartan Potassium | 12 |
| Hydralazine Hcl | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nephrology Physician Overview
How Ajay Kumar, M.D. fits within the Nephrology Physician landscape nationally.
10,569
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,454
Avg Claims per Provider
Ajay Kumar, M.D.'s 246 claims are below the specialty average of 1,454.
Nearby Nephrology Physician Providers in Maryland
Other clinicians with the same primary specialty enrolled in Maryland, drawn from the same CMS NPPES roster as Kumar.
Dr. Hossam Abdalla
M.D.
Glen Burnie, MD
Dr. Marwa Abdalla
MBBS
Waldorf, MD
Dr. Veena Acharya
MD
Bel Air, MD
Dr. Rohini Adhikarla
M.D
Lutherville Timonium, MD
Dr. Muzna Adil
M.D.
Suitland, MD
Compare Nephrology 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 Maryland medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Nephrology 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 Ajay Kumar, M.D.'s specialty? ▼
Ajay Kumar, M.D. specializes in Nephrology Physician and practices in Columbia, Maryland. Credentials: M.D..
How much does Ajay Kumar, M.D. prescribe under Medicare Part D? ▼
In 2023, Ajay Kumar, M.D. wrote 246 Medicare Part D claims totaling $49K in drug costs for 56 beneficiaries.
Where is Ajay Kumar, M.D. located? ▼
Ajay Kumar, M.D. is located at 5999 HARPERS FARM RD STE W250, Columbia, MD, 21044. Phone: (410) 772-8822.
What is Ajay Kumar, M.D.'s NPI number? ▼
Ajay Kumar, M.D.'s National Provider Identifier (NPI) is 1922141241, issued on 02/15/2007.
Does Ajay Kumar, M.D. prescribe more brand-name or generic drugs? ▼
Ajay Kumar, M.D.'s prescribing is 27% brand-name and 73% generic drugs by claim count, with $45K in brand drug costs.
How many Nephrology Physician providers are there in the US? ▼
There are 10,569 Nephrology Physician providers across 55 states in the US. The average Nephrology Physician provider writes 1,454 Medicare Part D claims per year.
What drugs does Ajay Kumar, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Ajay Kumar, M.D.'s most frequently prescribed drugs include Lokelma, Amlodipine Besylate, Doxazosin Mesylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ajay Kumar, M.D. accept Medicare? ▼
Ajay Kumar, M.D. appears in CMS Medicare data with 246 Part D claims and 56 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ajay Kumar, M.D.'s credentials? ▼
Ajay Kumar, M.D.'s NPI is 1922141241 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
Compiled from official public sources by the PlainDoctor editorial team.
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.