NPI registry status
Active
2026 NPPES data Critical Care Medicine (Internal Medicine) Physician NPI 1427089168 M.D
Verify on CMS → Clement Singarajah, M.D
Critical Care Medicine (Internal Medicine) Physician in Phoenix, 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 6,916 in Critical Care 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.
What the federal data shows
Clement Singarajah, M.D is a Critical Care Medicine (Internal Medicine) Physician in Phoenix, Arizona, listed in the federal CMS National Provider Identifier registry.
- #89
- Critical Care Medicine (Internal Medicine) Physician rank among Arizona specialties
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 Clement Singarajah, M.D
Bare NPI registry listing — limited federal enrichment beyond basic enumeration. Verify all credentials with official sources.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1427089168), first enumerated 07/05/2006.
Source: CMS NPPES
- Not in federal data
Medicare Part D participation
No 2023 Medicare Part D prescribing volume appears in the CMS public file for this NPI (may reflect specialty, new enrollment, or non-prescribing role).
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- 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 1427089168 · Critical Care Medicine (Internal Medicine) Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-NONE · BOOK-THIN · PHOTO-ENUM
- NPI-10 1427089168
- ENUM-LEGACY 2006
- TAX-MID 7K Critical Care
- RX-NONE No Part D
- BOOK-THIN 175 in Arizona
- PHOTO-ENUM Blesilda Ellis · 2006
◑
Board-eligible specialty (heuristic, not verified)
Clement Singarajah, M.D 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 Clement Singarajah, M.D?
Quality data not reportedPrimary specialty
Critical Care Medicine (Internal Medicine) Physician
Specialty distribution in Arizona
How Critical Care 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 Critical Care 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).
Practice Address
Provider Details
| NPI | 1427089168 |
|---|---|
| Specialty | Critical Care Medicine (Internal Medicine) Physician |
| Credentials | M.D |
| Gender | Male |
| NPI Issued | 07/05/2006 |
More Critical Care Medicine (Internal Medicine) Physician in AZ →
All providers in Arizona →
Compare specialties →
Critical Care Medicine (Internal Medicine) Physician Overview
How Clement Singarajah, M.D fits within the Critical Care Medicine (Internal Medicine) Physician landscape nationally.
6,916
Critical Care Medicine (Internal Medicine) Physician Providers in US
53
States with Critical Care Medicine (Internal Medicine) Physician
1,103
Avg Claims per Provider
Nationwide Critical Care Medicine (Internal Medicine) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Singarajah, 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 Critical Care 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 Singarajah.
One of 175 Critical Care Medicine (Internal Medicine) Physician providers enrolled in Arizona, 5 are shown here.
Frequently Asked Questions
What is Clement Singarajah, M.D's specialty? ▼
Clement Singarajah, M.D specializes in Critical Care Medicine (Internal Medicine) Physician and practices in Phoenix, Arizona. Credentials: M.D.
Where is Clement Singarajah, M.D located? ▼
Clement Singarajah, M.D is located at 650 E INDIAN SCHOOL RD, Phoenix, AZ, 85012. Phone: (602) 277-5551.
What is Clement Singarajah, M.D's NPI number? ▼
Clement Singarajah, M.D's National Provider Identifier (NPI) is 1427089168, issued on 07/05/2006.
How many Critical Care Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 6,916 Critical Care Medicine (Internal Medicine) Physician providers across 53 states in the US. The average Critical Care Medicine (Internal Medicine) Physician provider writes 1,103 Medicare Part D claims per year.
Does Clement Singarajah, M.D accept Medicare? ▼
Clement Singarajah, M.D appears in CMS Medicare data. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Clement Singarajah, M.D's credentials? ▼
Clement Singarajah, M.D's NPI is 1427089168 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.
- 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.