2026 NPPES data Geriatric Medicine (Internal Medicine) Physician NPI 1326016221 MD
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RAM SUBBUREDDIAR, MD

Geriatric Medicine (Internal Medicine) Physician in TUCSON, Arizona. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
12K
Medicare Part D claims · 607 beneficiaries · Geriatric Medicine (Internal Medicine) Physician avg: 4K
Generic prescribing
85%
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)

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 85% generic.

12K
Part D claims, 2023
85%
generic prescribing
$614.81
industry payments (Sunshine Act)

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 Top 2% higher than 98% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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-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 reported

NPI registry status

Active

Issued 03/08/2006

NPI 1326016221

Primary specialty

Geriatric Medicine (Internal Medicine) Physician

Niche

4,161 US NPIs in this specialty

Medicare Part D claims

11,538 159% vs specialty avg

2023 prescription claims

Specialty avg: 4,450

Specialty distribution in Arizona

How Geriatric Medicine (Internal Medicine) Physician compares to other specialties among Arizona providers

Arizona providers

Geriatric Medicine (Internal Medicine) Physician share within Arizona

1. Geriatric Medicine (Internal Medicine) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Geriatric Medicine (Internal Medicine) Physician share within Arizona

Specialty board-certification context

Estimated specialty board-certified rate — Geriatric Medicine (Internal Medicine) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Geriatric Medicine (Internal Medicine) Physician ABMS/AOA estimate

Est. board-certified rate (Geriatric Medicine (Internal Medicine) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Geriatric Medicine (Internal Medicine) Physician) — ABMS / AOA estimate

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. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what SUBBUREDDIAR most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

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 85% generic by claim count, with an opioid prescribing rate of 8.4%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Geriatric Medicine (Internal Medicine) Physician is a narrow specialty nationwide, with 4,161 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

6556 E CARONDELET DR
TUCSON, AZ 85710

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%
Specialty average (est.)

15% brand-name claims vs 85% 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 / 85% 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

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
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.

Geriatric Medicine (Internal Medicine) Physician Overview

How RAM SUBBUREDDIAR, MD fits within the Geriatric Medicine (Internal Medicine) Physician landscape nationally.

4,161
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.

Compare Geriatric Medicine (Internal Medicine) Physician nationally: see state-by-state distribution →

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 85% 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 4,161 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

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