2026 NPPES data Nephrology Physician NPI 1669586475 M.D.
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RAVI DAMARAJU, M.D.

Nephrology Physician in ELGIN, Illinois. 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 · 247 beneficiaries · Nephrology Physician avg: 1K
Generic prescribing
94%
generic claims · 6% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$456.29
11 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: RAVI DAMARAJU, M.D. is a Nephrology Physician ([object Object]) practicing in ELGIN, Illinois with a Medicare Part D prescribing footprint of 1K claims across 247 beneficiaries — 6% brand-name prescribing . Industry payments of $456.29 across 11 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: RAVI DAMARAJU, M.D. filed 1,184 Medicare Part D claims in 2023 across ELGIN, Illinois. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

RAVI DAMARAJU, 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).

RAVI DAMARAJU, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 08/18/2006

NPI 1669586475

Primary specialty

Nephrology Physician

Mid-sized

10,534 US NPIs in this specialty

Medicare Part D claims

1,184 19% vs specialty avg

2023 prescription claims

Specialty avg: 1,454

Specialty distribution in Illinois

How Nephrology Physician compares to other specialties among Illinois providers

Illinois providers

Nephrology Physician share within Illinois

1. Nephrology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Nephrology Physician share within Illinois

Specialty board-certification context

Estimated specialty board-certified rate — Nephrology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Nephrology Physician ABMS/AOA estimate

Est. board-certified rate (Nephrology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Nephrology 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).

RAVI DAMARAJU, M.D. is a Nephrology Physician provider practicing in ELGIN, Illinois, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1669586475. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

RAVI DAMARAJU, M.D. appears in the CMS NPPES registry as a Nephrology Physician provider holding M.D. credentials at 1600 N RANDALL RD STE 135, ELGIN, IL, 60123, with a listed phone of (847) 531-5911. NPI 1669586475 was issued on 08/18/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what DAMARAJU 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 1,184 prescription claims written by this provider, covering 247 Medicare beneficiaries and totaling roughly $76K in drug spend, split 6% brand-name and 94% generic by claim count. 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.

Nephrology Physician is a mid-sized specialty nationwide, with 10,534 enrolled providers across 55 states and an average of 1,454 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

1600 N RANDALL RD STE 135
ELGIN, IL 60123

Provider Details

NPI 1669586475
Specialty Nephrology Physician
Credentials M.D.
Gender Male
NPI Issued 08/18/2006

Hospital and facility affiliations

Facilities where RAVI DAMARAJU, 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.

NEPHROLOGY ASSOCIATES OF NORTHERN ILLINOIS LTD
HUNTLEY, IL

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 RAVI DAMARAJU, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$456

Largest payer

AstraZeneca Pharmaceuticals LP

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.

License & disciplinary context — Illinois IDFPR 2023 annual report

Aggregate state board data only — NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~42K Illinois medical licensees in 2023 — they are NOT specific to RAVI DAMARAJU, M.D.. To verify RAVI DAMARAJU, M.D.'s current license status, search the IDFPR public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

106
Total board actions, Illinois 2023
Across 103 cases
2.52
Actions per 1,000 licensees
Illinois statewide rate
probation
Most common action type
38 cases

IDFPR publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Illinois disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Generic-heavy

RAVI DAMARAJU, M.D. — brand share 6.0%
Specialty average (est.)

6% brand-name claims vs 94% generic, on 1,184 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.

1,184
Total Claims
$76K
Total Drug Cost
247
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,388
Total Day Supply
70,540
Brand vs Generic
6% brand / 94% generic
Brand Drug Cost
$33K
Generic Drug Cost
$43K
Antibiotic Claims
15

Patient Demographics

Average Patient Age
75.0 years
Avg HCC Risk Score
3.23
Gender Split
52% female / 48% male
Age Distribution
<65: 26, 65-74: 83, 75-84: 108, 85+: 30

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Furosemide
174
Amlodipine Besylate
130
Calcitriol
96
Hydralazine Hcl
83
Losartan Potassium
48
Hydrochlorothiazide
47
Carvedilol
42
Bumetanide
39
Lisinopril
38
Sevelamer Carbonate
35

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

Nephrology Physician Overview

How RAVI DAMARAJU, M.D. fits within the Nephrology Physician landscape nationally.

10,534
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,454
Avg Claims per Provider

RAVI DAMARAJU, M.D.'s 1,184 claims are below the specialty average of 1,454.

Nearby Nephrology Physician Providers in Illinois

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

Compare Nephrology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is RAVI DAMARAJU, M.D.'s specialty?
RAVI DAMARAJU, M.D. specializes in Nephrology Physician and practices in ELGIN, Illinois. Credentials: M.D..
How much does RAVI DAMARAJU, M.D. prescribe under Medicare Part D?
In 2023, RAVI DAMARAJU, M.D. wrote 1,184 Medicare Part D claims totaling $76K in drug costs for 247 beneficiaries.
Where is RAVI DAMARAJU, M.D. located?
RAVI DAMARAJU, M.D. is located at 1600 N RANDALL RD STE 135, ELGIN, IL, 60123. Phone: (847) 531-5911.
What is RAVI DAMARAJU, M.D.'s NPI number?
RAVI DAMARAJU, M.D.'s National Provider Identifier (NPI) is 1669586475, issued on 08/18/2006.
Does RAVI DAMARAJU, M.D. prescribe more brand-name or generic drugs?
RAVI DAMARAJU, M.D.'s prescribing is 6% brand-name and 94% generic drugs by claim count, with $33K in brand drug costs.
How many Nephrology Physician providers are there in the US?
There are 10,534 Nephrology Physician providers across 55 states in the US. The average Nephrology Physician provider writes 1,454 Medicare Part D claims per year.
What drugs does RAVI DAMARAJU, M.D. prescribe most often?
Based on 2023 Medicare Part D data, RAVI DAMARAJU, M.D.'s most frequently prescribed drugs include Furosemide, Amlodipine Besylate, Calcitriol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does RAVI DAMARAJU, M.D. accept Medicare?
RAVI DAMARAJU, M.D. appears in CMS Medicare data with 1,184 Part D claims and 247 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify RAVI DAMARAJU, M.D.'s credentials?
RAVI DAMARAJU, M.D.'s NPI is 1669586475 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.
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