2026 NPPES data Critical Care Medicine (Internal Medicine) Physician NPI 1538380464 M.D.
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RAM SUBRAMANIAN, M.D.

Critical Care Medicine (Internal Medicine) Physician in ATLANTA, Georgia. 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
1K
Medicare Part D claims · 134 beneficiaries · Critical Care Medicine (Internal Medicine) Physician avg: 1K
MIPS score
92.2614/100
▲ 9 pts above national avg 83.1 · [object Object]
Industry payments
$55.3K
18 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

RAM SUBRAMANIAN, M.D. reported a CMS MIPS final score of 92.2614/100 — above the 83.1 national average — and filed 1,191 Medicare Part D claims in 2023.

92.2614/100
MIPS score · +9 vs avg
1K
Part D claims, 2023
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.

RAM SUBRAMANIAN, M.D.'s MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023 — the federal quality measure

92 Top 32% higher than 68% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). Below this entry. 80–90: 129,887 scored providers (27%). Below this entry. 90–100: 189,403 scored providers (40%). This entry sits in this band. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023

Board certification likely (heuristic — not verified)

RAM SUBRAMANIAN, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 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 RAM SUBRAMANIAN, M.D.?

High performer (top quartile)

NPI registry status

Active

Issued 05/01/2007

NPI 1538380464

Primary specialty

Critical Care Medicine (Internal Medicine) Physician

Mid-sized

6,631 US NPIs in this specialty

Medicare Part D claims

1,191 11% vs specialty avg

2023 prescription claims

Specialty avg: 1,069

MIPS final score

92.2614/100 9.1614% pts

Exceptional band

vs 83.1 national avg

Specialty distribution in Georgia

How Critical Care Medicine (Internal Medicine) Physician compares to other specialties among Georgia providers

Georgia providers

Critical Care Medicine (Internal Medicine) Physician share within Georgia

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

Medicare quality performance — MIPS

RAM SUBRAMANIAN, M.D.'s 2023 MIPS final score plotted against the Critical Care Medicine (Internal Medicine) Physician national average

High performer (top quartile)
MIPS Final Score
92.2614/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Critical Care Medicine (Internal Medicine) Physician) — 92.2614/100 vs national avg 83.1

0%100%National avg83%92.3%
MIPS final score (Critical Care Medicine (Internal Medicine) Physician) — 92.2614/100 vs national avg 83.1

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 SUBRAMANIAN, M.D. appears in the CMS NPPES registry as a Critical Care Medicine (Internal Medicine) Physician provider holding M.D. credentials at 1365 CLIFTON RD NE BLDG B-1, ATLANTA, GA, 30322, with a listed phone of (404) 778-3184. NPI 1538380464 was issued on 05/01/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what SUBRAMANIAN 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 1,191 prescription claims written by this provider, covering 134 Medicare beneficiaries and totaling roughly $242K in drug spend, with an opioid prescribing rate of 1.0%. 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. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 92.2614/100 for the 2023 performance year (Quality 73.8353), compared with the national average of 83.1.

Critical Care Medicine (Internal Medicine) Physician is a mid-sized specialty nationwide, with 6,631 enrolled providers across 53 states and an average of 1,069 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

1365 CLIFTON RD NE BLDG B-1
ATLANTA, GA 30322

Provider Details

NPI 1538380464
Specialty Critical Care Medicine (Internal Medicine) Physician
Credentials M.D.
Gender Male
NPI Issued 05/01/2007

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

92.2614
Final Score
Avg: 83.1
73.8353
Quality
100
Promoting Interoperability

Reporting: Alternative Payment Model

Hospital and facility affiliations

Facilities where RAM SUBRAMANIAN, 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.

THE EMORY CLINIC INC
ATLANTA, GA

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 RAM SUBRAMANIAN, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$55.3K

Largest payer

Baxter Healthcare

Most common payment type

Travel and Lodging

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.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

1,191
Total Claims
$242K
Total Drug Cost
134
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,902
Total Day Supply
55,990
Generic Drug Cost
$124K
Opioid Claims
12 (1.0% rate)
Antibiotic Claims
38

Patient Demographics

Average Patient Age
63.7 years
Avg HCC Risk Score
3.34
Gender Split
41% female / 59% male
Age Distribution
<65: 50, 65-74: 67, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What RAM SUBRAMANIAN, M.D. 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
Tacrolimus
256
Pantoprazole Sodium
132
Mycophenolate Mofetil
104
Ursodiol
72
Prednisone
65
Nifedipine Er
Nifedipine
51
Carvedilol
33
Spironolactone
25
Lactulose
24
Vemlidy
Tenofovir Alafenamide
21

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Critical Care Medicine (Internal Medicine) Physician Overview

How RAM SUBRAMANIAN, M.D. fits within the Critical Care Medicine (Internal Medicine) Physician landscape nationally.

6,631
Critical Care Medicine (Internal Medicine) Physician Providers in US
53
States with Critical Care Medicine (Internal Medicine) Physician
1,069
Avg Claims per Provider

RAM SUBRAMANIAN, M.D.'s 1,191 claims are above the specialty average of 1,069.

Nearby Critical Care Medicine (Internal Medicine) Physician Providers in Georgia

Other clinicians with the same primary specialty enrolled in Georgia, drawn from the same CMS NPPES roster as SUBRAMANIAN.

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

Frequently Asked Questions

What is RAM SUBRAMANIAN, M.D.'s specialty?
RAM SUBRAMANIAN, M.D. specializes in Critical Care Medicine (Internal Medicine) Physician and practices in ATLANTA, Georgia. Credentials: M.D..
How much does RAM SUBRAMANIAN, M.D. prescribe under Medicare Part D?
In 2023, RAM SUBRAMANIAN, M.D. wrote 1,191 Medicare Part D claims totaling $242K in drug costs for 134 beneficiaries.
What is RAM SUBRAMANIAN, M.D.'s Medicare quality score?
RAM SUBRAMANIAN, M.D. has a CMS MIPS Final Score of 92.2614/100 (Quality: 73.8353). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is RAM SUBRAMANIAN, M.D. located?
RAM SUBRAMANIAN, M.D. is located at 1365 CLIFTON RD NE BLDG B-1, ATLANTA, GA, 30322. Phone: (404) 778-3184.
What is RAM SUBRAMANIAN, M.D.'s NPI number?
RAM SUBRAMANIAN, M.D.'s National Provider Identifier (NPI) is 1538380464, issued on 05/01/2007.
Does RAM SUBRAMANIAN, M.D. prescribe opioids?
Yes, RAM SUBRAMANIAN, M.D. had 12 opioid claims in 2023 with an opioid prescribing rate of 1.0%.
How many Critical Care Medicine (Internal Medicine) Physician providers are there in the US?
There are 6,631 Critical Care Medicine (Internal Medicine) Physician providers across 53 states in the US. The average Critical Care Medicine (Internal Medicine) Physician provider writes 1,069 Medicare Part D claims per year.
What drugs does RAM SUBRAMANIAN, M.D. prescribe most often?
Based on 2023 Medicare Part D data, RAM SUBRAMANIAN, M.D.'s most frequently prescribed drugs include Tacrolimus, Pantoprazole Sodium, Mycophenolate Mofetil. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does RAM SUBRAMANIAN, M.D. accept Medicare?
RAM SUBRAMANIAN, M.D. appears in CMS Medicare data with 1,191 Part D claims and 134 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify RAM SUBRAMANIAN, M.D.'s credentials?
RAM SUBRAMANIAN, M.D.'s NPI is 1538380464 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

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.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) — 2023 performance year.
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