NPI registry status
Active
2026 NPPES data Geriatric Medicine (Internal Medicine) Physician NPI 1326016221 MD
Verify on CMS → Ram Subbureddiar, MD
Geriatric Medicine (Internal Medicine) Physician in Tucson, 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 4,171 in Geriatric 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
12K
Medicare Part D claims · 607 beneficiaries · Geriatric Medicine (Internal Medicine) Physician avg: 4K
Generic prescribing
84%
generic claims · 15% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$614.81
28 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Ram Subbureddiar, MD filed 11,538 Medicare Part D claims in 2023 as a Geriatric Medicine (Internal Medicine) Physician in Tucson, Arizona, prescribing 84% generic.
- 12K
- Part D claims, 2023
- 84%
- generic prescribing
- $614.81
- industry payments (Sunshine Act)
- ≥98th
- 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.
Ram Subbureddiar, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
11,538 ≥ 98th percentile 98% 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)
Ram Subbureddiar, MD 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 Ram Subbureddiar, MD?
Quality data not reportedPrimary specialty
Geriatric Medicine (Internal Medicine) Physician
Medicare Part D claims
11,538 159% vs specialty avg
Specialty distribution in Arizona
How Geriatric Medicine (Internal Medicine) 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 Geriatric 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).
Ram Subbureddiar, MD appears in the CMS NPPES registry as a Geriatric Medicine (Internal Medicine) Physician provider holding MD credentials at 6556 E CARONDELET DR, Tucson, AZ, 85710, with a listed phone of (520) 296-8733. NPI 1326016221 was issued on 03/08/2006.
Medicare Part D records for calendar year 2023 show 11,538 prescription claims written by this provider, covering 607 Medicare beneficiaries and totaling roughly $1.1 million in drug spend, split 15% brand-name and 84% generic by claim count, with an opioid prescribing rate of 8.4%.
Geriatric Medicine (Internal Medicine) Physician is a narrow specialty nationwide, with 4,171 enrolled providers across 52 states and an average of 4,450 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 | 1326016221 |
|---|---|
| Specialty | Geriatric Medicine (Internal Medicine) Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 03/08/2006 |
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 Ram Subbureddiar, MD. Source: openpaymentsdata.cms.gov.
Total received
$615
Largest payer
Sumitomo Pharma America, 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 · Typical
Ram Subbureddiar, MD - brand share 15.0%
Geriatric Medicine (Internal Medicine) Physician average
15% brand-name claims vs 84% generic, on 11,538 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.
11,538
Total Claims
$1.1M
Total Drug Cost
607
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 20,302
- Total Day Supply
- 582,869
- Brand vs Generic
- 15% brand / 84% generic
- Brand Drug Cost
- $848K
- Generic Drug Cost
- $217K
- Opioid Claims
- 967 (8.4% rate)
- Antibiotic Claims
- 323
Patient Demographics
- Average Patient Age
- 72.3 years
- Avg HCC Risk Score
- 1.63
- Gender Split
- 52% female / 48% male
- Age Distribution
- <65: 109, 65-74: 238, 75-84: 172, 85+: 88
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Ram Subbureddiar, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
531 claims
- Levothyroxine Sodium
Levothyroxine Sodium
522 claims
- Amlodipine Besylate
Amlodipine Besylate
441 claims
- Gabapentin
Gabapentin
362 claims
- Metformin Hcl
Metformin Hcl
322 claims
- Lisinopril
Lisinopril
315 claims
- Furosemide
Furosemide
313 claims
- Oxycodone Hcl
Oxycodone Hcl
291 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 531 |
| Levothyroxine Sodium | 522 |
| Amlodipine Besylate | 441 |
| Gabapentin | 362 |
| Metformin Hcl | 322 |
| Lisinopril | 315 |
| Furosemide | 313 |
| Oxycodone Hcl | 291 |
| Omeprazole | 247 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 240 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Geriatric Medicine (Internal Medicine) Physician in AZ →
All providers in Arizona →
Compare specialties →
Geriatric Medicine (Internal Medicine) Physician Overview
How Ram Subbureddiar, MD fits within the Geriatric Medicine (Internal Medicine) Physician landscape nationally.
4,171
Geriatric Medicine (Internal Medicine) Physician Providers in US
52
States with Geriatric Medicine (Internal Medicine) Physician
4,450
Avg Claims per Provider
Ram Subbureddiar, MD's 11,538 claims are above the specialty average of 4,450.
Nearby Geriatric Medicine (Internal Medicine) Physician Providers in Arizona
Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as Subbureddiar.
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 Arizona medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Geriatric 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.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Arizona
Frequently Asked Questions
What is Ram Subbureddiar, MD's specialty? ▼
Ram Subbureddiar, MD specializes in Geriatric Medicine (Internal Medicine) Physician and practices in Tucson, Arizona. Credentials: MD.
How much does Ram Subbureddiar, MD prescribe under Medicare Part D? ▼
In 2023, Ram Subbureddiar, MD wrote 11,538 Medicare Part D claims totaling $1.1M in drug costs for 607 beneficiaries.
Where is Ram Subbureddiar, MD located? ▼
Ram Subbureddiar, MD is located at 6556 E CARONDELET DR, Tucson, AZ, 85710. Phone: (520) 296-8733.
What is Ram Subbureddiar, MD's NPI number? ▼
Ram Subbureddiar, MD's National Provider Identifier (NPI) is 1326016221, issued on 03/08/2006.
Does Ram Subbureddiar, MD prescribe more brand-name or generic drugs? ▼
Ram Subbureddiar, MD's prescribing is 15% brand-name and 84% generic drugs by claim count, with $848K in brand drug costs.
Does Ram Subbureddiar, MD prescribe opioids? ▼
Yes, Ram Subbureddiar, MD had 967 opioid claims in 2023 with an opioid prescribing rate of 8.4%.
How many Geriatric Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 4,171 Geriatric Medicine (Internal Medicine) Physician providers across 52 states in the US. The average Geriatric Medicine (Internal Medicine) Physician provider writes 4,450 Medicare Part D claims per year.
What drugs does Ram Subbureddiar, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Ram Subbureddiar, MD's most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ram Subbureddiar, MD accept Medicare? ▼
Ram Subbureddiar, MD appears in CMS Medicare data with 11,538 Part D claims and 607 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ram Subbureddiar, MD's credentials? ▼
Ram Subbureddiar, MD's NPI is 1326016221 with credentials MD. 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.