NPI registry status
Active
2026 NPPES data Nephrology Physician NPI 1538133236 M.D.
Verify on CMS → Harnath Singh, M.D.
Nephrology Physician in Flagstaff, Arizona.
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
613
Medicare Part D claims · 151 beneficiaries · Nephrology Physician avg: 2K
Generic prescribing
93%
generic claims · 7% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$219.99
10 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Harnath Singh, M.D. filed 613 Medicare Part D claims in 2024 as a Nephrology Physician in Flagstaff, Arizona, prescribing 93% generic.
- 613
- Part D claims, 2024
- 93%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥68th
- 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 Harnath Singh, 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 1538133236), first enumerated 02/17/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 613 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
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$219.99 in reported industry payments (10 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- 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 1538133236 · Nephrology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1538133236
- ENUM-LEGACY 2006
- TAX-MID 11K Nephrology Physician
- RX-LIGHT 613
- BOOK-THIN 223 in Arizona
- PHOTO-ENUM Lionel Mailloux, MD · 2006
Harnath Singh, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
613 ≥ 68th percentile 68% 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)
Harnath Singh, 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 Harnath Singh, M.D.?
Quality data not reportedPrimary specialty
Nephrology Physician
Medicare Part D claims
613 59% vs specialty avg
Specialty distribution in Arizona
How Nephrology Physician compares to other specialties among Arizona 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 | 1538133236 |
|---|---|
| Specialty | Nephrology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 02/17/2006 |
Hospital and facility affiliations
Facilities where Harnath Singh, 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.
Akdhc LLC
Flagstaff, AZ
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 Harnath Singh, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$220
Largest payer
Otsuka America Pharmaceutical, 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 · Generic-heavy
Harnath Singh, M.D. - brand share 7.0%
Nephrology Physician average
7% brand-name claims vs 93% generic, on 613 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.
613
Total Claims
$41K
Total Drug Cost
151
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,271.667
- Total Day Supply
- 37,107
- Brand vs Generic
- 7% brand / 93% generic
- Brand Drug Cost
- $28K
- Generic Drug Cost
- $13K
- Antibiotic Claims
- 34
Patient Demographics
- Average Patient Age
- 72.5 years
- Avg HCC Risk Score
- 3.14
- Gender Split
- 46% female / 54% male
- Age Distribution
- <65: 27, 65-74: 53, 75-84: 48, 85+: 23
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Harnath Singh, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Furosemide
Furosemide
83 claims
- Allopurinol
Allopurinol
79 claims
- Losartan Potassium
Losartan Potassium
41 claims
- Sevelamer Carbonate
Sevelamer Carbonate
37 claims
- Lisinopril
Lisinopril
36 claims
- Calcitriol 32
Calcitriol
32 claims
- Amlodipine Besylate 29
Amlodipine Besylate
29 claims
- Calcium Acetate 21
Calcium Acetate
21 claims
| Drug | Claims |
|---|---|
| Furosemide | 83 |
| Allopurinol | 79 |
| Losartan Potassium | 41 |
| Sevelamer Carbonate | 37 |
| Lisinopril | 36 |
| Calcitriol | 32 |
| Amlodipine Besylate | 29 |
| Calcium Acetate | 21 |
| Metoprolol Tartrate | 20 |
| Hydrochlorothiazide | 19 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nephrology Physician Overview
How Harnath Singh, 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
Harnath Singh, M.D.'s 613 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 Singh, both outside Arizona 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 Arizona
Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as Singh.
One of 223 Nephrology Physician providers enrolled in Arizona, 5 are shown here.
Dr. Abubakr Abdelaziz
M.D
Kingman, AZ
Dr. Sohail Abdul Salim
MD
Phoenix, AZ
Mhd Majed Abdul Wahab
Peoria, AZ
Dr. Manuel Abrante
M.D.
Mesa, AZ
Dr. Chirag Acharya
MD
Sun City, AZ
Compare Nephrology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Harnath Singh, M.D.'s specialty? ▼
Harnath Singh, M.D. specializes in Nephrology Physician and practices in Flagstaff, Arizona. Credentials: M.D..
How much does Harnath Singh, M.D. prescribe under Medicare Part D? ▼
In 2024, Harnath Singh, M.D. wrote 613 Medicare Part D claims totaling $41K in drug costs for 151 beneficiaries.
Where is Harnath Singh, M.D. located? ▼
Harnath Singh, M.D. is located at 2201 N VICKEY ST STE 110, Flagstaff, AZ, 86004. Phone: (928) 213-9460.
What is Harnath Singh, M.D.'s NPI number? ▼
Harnath Singh, M.D.'s National Provider Identifier (NPI) is 1538133236, issued on 02/17/2006.
Does Harnath Singh, M.D. prescribe more brand-name or generic drugs? ▼
Harnath Singh, M.D.'s prescribing is 7% brand-name and 93% generic drugs by claim count, with $28K 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 Harnath Singh, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Harnath Singh, M.D.'s most frequently prescribed drugs include Furosemide, Allopurinol, Losartan Potassium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Harnath Singh, M.D. accept Medicare? ▼
Harnath Singh, M.D. appears in CMS Medicare data with 613 Part D claims and 151 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Harnath Singh, M.D.'s credentials? ▼
Harnath Singh, M.D.'s NPI is 1538133236 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.