NPI registry status
Active
2026 NPPES data Nephrology Physician NPI 1619998499 M.D.
Verify on CMS → John Gray, M.D.
Nephrology Physician in Brooklyn Center, Minnesota.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 10,534 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
1K
Medicare Part D claims · 191 beneficiaries · Nephrology Physician avg: 1K
Generic prescribing
84%
generic claims · 16% brand-name · higher generic rates reduce patient out-of-pocket costs
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
John Gray, M.D. filed 1,042 Medicare Part D claims in 2023 as a Nephrology Physician in Brooklyn Center, Minnesota, prescribing 84% generic.
- 1K
- Part D claims, 2023
- 84%
- 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.
John Gray, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,042 Top 24% higher than 76% 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)
John Gray, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 3 hospital affiliations - 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 John Gray, M.D.?
Quality data not reportedPrimary specialty
Nephrology Physician
Medicare Part D claims
1,042 28% vs specialty avg
Specialty distribution in Minnesota
How Nephrology Physician compares to other specialties among Minnesota 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).
John Gray, M.D. appears in the CMS NPPES registry as a Nephrology Physician provider holding M.D. credentials at 6200 SHINGLE CREEK PKWY, Brooklyn Center, MN, 55430, with a listed phone of (763) 544-0696. NPI 1619998499 was issued on 07/21/2006.
Medicare Part D records for calendar year 2023 show 1,042 prescription claims written by this provider, covering 191 Medicare beneficiaries and totaling roughly $257K in drug spend, split 16% brand-name and 84% generic by claim count.
Nephrology Physician is a mid-sized specialty nationwide, with 10,534 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 | 1619998499 |
|---|---|
| Specialty | Nephrology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 07/21/2006 |
Hospital and facility affiliations
Facilities where John Gray, 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.
According to CMS billing records, John Gray, M.D. is affiliated with 3 Medicare-billing facilities.
Kidney Specialists OF Minnesota, PA
Brooklyn Center, MN
North Memorial Health Care
Robbinsdale, MN
Regency Hospital OF Minneapolis, LLC
Golden Valley, MN
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Typical
John Gray, M.D. - brand share 16.0%
Nephrology Physician average
16% brand-name claims vs 84% generic, on 1,042 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.
1,042
Total Claims
$257K
Total Drug Cost
191
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,429
- Total Day Supply
- 72,158
- Brand vs Generic
- 16% brand / 84% generic
- Brand Drug Cost
- $191K
- Generic Drug Cost
- $66K
- Antibiotic Claims
- 16
Patient Demographics
- Average Patient Age
- 72.8 years
- Avg HCC Risk Score
- 3.69
- Gender Split
- 50% female / 50% male
- Age Distribution
- <65: 31, 65-74: 71, 75-84: 64, 85+: 25
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What John Gray, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Torsemide
Torsemide
121 claims
- Jardiance
Jardiance
106 claims
- Calcitriol
Calcitriol
90 claims
- Metoprolol Succinate
Metoprolol Succinate
74 claims
- Sevelamer Carbonate
Sevelamer Carbonate
62 claims
- Amlodipine Besylate
Amlodipine Besylate
54 claims
- Chlorthalidone 45
Chlorthalidone
45 claims
- Lisinopril 44
Lisinopril
44 claims
| Drug | Claims |
|---|---|
| Torsemide | 121 |
| Jardiance Empagliflozin | 106 |
| Calcitriol | 90 |
| Metoprolol Succinate | 74 |
| Sevelamer Carbonate | 62 |
| Amlodipine Besylate | 54 |
| Chlorthalidone | 45 |
| Lisinopril | 44 |
| Calcium Acetate | 30 |
| Furosemide | 28 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nephrology Physician Overview
How John Gray, M.D. fits within the Nephrology Physician landscape nationally.
10,534
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,454
Avg Claims per Provider
John Gray, M.D.'s 1,042 claims are below the specialty average of 1,454.
Nearby Nephrology Physician Providers in Minnesota
Other clinicians with the same primary specialty enrolled in Minnesota, drawn from the same CMS NPPES roster as Gray.
Dr. Mohammed Abdalla
MD
Rochester, MN
Dr. Ahmed Abdalrhim
MBBS
Rochester, MN
Dr. Paul Abraham
MD
St Paul, MN
Dr. Amogh Agrawal
MD
Rochester, MN
Dr. Aqeel Ahmad
M.D.
Saint Paul, MN
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 Minnesota 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 John Gray, M.D.'s specialty? ▼
John Gray, M.D. specializes in Nephrology Physician and practices in Brooklyn Center, Minnesota. Credentials: M.D..
How much does John Gray, M.D. prescribe under Medicare Part D? ▼
In 2023, John Gray, M.D. wrote 1,042 Medicare Part D claims totaling $257K in drug costs for 191 beneficiaries.
Where is John Gray, M.D. located? ▼
John Gray, M.D. is located at 6200 SHINGLE CREEK PKWY, Brooklyn Center, MN, 55430. Phone: (763) 544-0696.
What is John Gray, M.D.'s NPI number? ▼
John Gray, M.D.'s National Provider Identifier (NPI) is 1619998499, issued on 07/21/2006.
Does John Gray, M.D. prescribe more brand-name or generic drugs? ▼
John Gray, M.D.'s prescribing is 16% brand-name and 84% generic drugs by claim count, with $191K in brand drug costs.
How many Nephrology Physician providers are there in the US? ▼
There are 10,534 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 John Gray, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, John Gray, M.D.'s most frequently prescribed drugs include Torsemide, Jardiance, Calcitriol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does John Gray, M.D. accept Medicare? ▼
John Gray, M.D. appears in CMS Medicare data with 1,042 Part D claims and 191 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John Gray, M.D.'s credentials? ▼
John Gray, M.D.'s NPI is 1619998499 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.