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 10,806 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 · 182 beneficiaries · Nephrology Physician avg: 2K
Generic prescribing
83%
generic claims · 17% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
John Gray, M.D. filed 1,039 Medicare Part D claims in 2024 as a Nephrology Physician in Brooklyn Center, Minnesota, prescribing 83% generic.
- 1K
- Part D claims, 2024
- 83%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥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.
Federal trust snapshot
What official records show about John Gray, 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 1619998499), first enumerated 07/21/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 1,039 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
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
3 CMS Care Compare hospital affiliations on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- 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 1619998499 · Nephrology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1619998499
- ENUM-LEGACY 2006
- TAX-MID 11K Nephrology Physician
- RX-MID 1,039
- BOOK-THIN 204 in Minnesota
- PHOTO-ENUM Steven Rosansky · 2006
John Gray, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
1,039 ≥ 75th percentile 75% of 1,416,883 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 · 2024
✓
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
1,039 31% 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).
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 17.0%
Nephrology Physician average
17% brand-name claims vs 83% generic, on 1,039 2024 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 2024.
1,039
Total Claims
$251K
Total Drug Cost
182
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,482.233
- Total Day Supply
- 73,787
- Brand vs Generic
- 17% brand / 83% generic
- Brand Drug Cost
- $207K
- Generic Drug Cost
- $44K
- Antibiotic Claims
- 19
Patient Demographics
- Average Patient Age
- 72.2 years
- Avg HCC Risk Score
- 3.26
- Gender Split
- 49% female / 51% male
- Age Distribution
- <65: 25, 65-74: 82, 75-84: 54, 85+: 21
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What John Gray, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Jardiance
Jardiance
134 claims
- Torsemide
Torsemide
117 claims
- Calcitriol
Calcitriol
111 claims
- Lisinopril
Lisinopril
63 claims
- Metoprolol Succinate
Metoprolol Succinate
63 claims
- Amlodipine Besylate
Amlodipine Besylate
56 claims
- Chlorthalidone 52
Chlorthalidone
52 claims
- Sevelamer Carbonate 48
Sevelamer Carbonate
48 claims
| Drug | Claims |
|---|---|
| Jardiance Empagliflozin | 134 |
| Torsemide | 117 |
| Calcitriol | 111 |
| Lisinopril | 63 |
| Metoprolol Succinate | 63 |
| Amlodipine Besylate | 56 |
| Chlorthalidone | 52 |
| Sevelamer Carbonate | 48 |
| Prednisone | 29 |
| Calcium Acetate | 27 |
* 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.
10,806
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,511
Avg Claims per Provider
John Gray, M.D.'s 1,039 claims are below the specialty average of 1,511.
Nationwide Nephrology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Gray, both outside Minnesota so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
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.
One of 204 Nephrology Physician providers enrolled in Minnesota, 5 are shown here.
Dr. Mohammed Abdalla
MD
Rochester, MN
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 →
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 2024, John Gray, M.D. wrote 1,039 Medicare Part D claims totaling $251K in drug costs for 182 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 17% brand-name and 83% generic drugs by claim count, with $207K in brand drug costs.
How many Nephrology Physician providers are there in the US? ▼
There are 10,806 Nephrology Physician providers across 55 states in the US. The average Nephrology Physician provider writes 1,511 Medicare Part D claims per year.
What drugs does John Gray, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, John Gray, M.D.'s most frequently prescribed drugs include Jardiance, Torsemide, 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 1,039 Part D claims and 182 Medicare beneficiaries in 2024. 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 (2024). 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 August 2026 (NPPES) / 2024 (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 August 2026.