NPI registry status
Active
2026 NPPES data Critical Care Medicine (Internal Medicine) Physician NPI 1700823127 MD
Verify on CMS → Vijay Chaku, MD
Critical Care Medicine (Internal Medicine) Physician in Saginaw, Michigan.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 6,646 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.
Prescribing volume
2K
Medicare Part D claims · 116 beneficiaries · Critical Care Medicine (Internal Medicine) Physician avg: 1K
Generic prescribing
87%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Vijay Chaku, MD filed 1,885 Medicare Part D claims in 2023 as a Critical Care Medicine (Internal Medicine) Physician in Saginaw, Michigan, prescribing 87% generic.
- 2K
- Part D claims, 2023
- 87%
- generic prescribing
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.
Vijay Chaku, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,885 Top 17% higher than 83% of 1,370,886 prescribers
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)
Vijay Chaku, 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 Vijay Chaku, MD?
Quality data not reportedPrimary specialty
Critical Care Medicine (Internal Medicine) Physician
Medicare Part D claims
1,885 76% vs specialty avg
Specialty distribution in Michigan
How Critical Care Medicine (Internal Medicine) Physician compares to other specialties among Michigan 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).
Vijay Chaku, MD appears in the CMS NPPES registry as a Critical Care Medicine (Internal Medicine) Physician provider holding MD credentials at 3400 SHATTUCK RD, Saginaw, MI, 48603, with a listed phone of (989) 791-2512. NPI 1700823127 was issued on 06/02/2006.
Medicare Part D records for calendar year 2023 show 1,885 prescription claims written by this provider, covering 116 Medicare beneficiaries and totaling roughly $148K in drug spend, split 12% brand-name and 87% generic by claim count.
Critical Care Medicine (Internal Medicine) Physician is a mid-sized specialty nationwide, with 6,646 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
Provider Details
| NPI | 1700823127 |
|---|---|
| Specialty | Critical Care Medicine (Internal Medicine) Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 06/02/2006 |
License & disciplinary context - Michigan MI-BOM 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 ~41K Michigan medical licensees in 2023 - they are NOT specific to Vijay Chaku, MD. To verify Vijay Chaku, MD's current license status, search the MI-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
123
Total board actions, Michigan 2023
Across 120 cases
3.00
Actions per 1,000 licensees
Michigan statewide rate
probation
Most common action type
44 cases
MI-BOM 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 Michigan disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Vijay Chaku, MD - brand share 12.0%
Critical Care Medicine (Internal Medicine) Physician average
12% brand-name claims vs 87% generic, on 1,885 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.
1,885
Total Claims
$148K
Total Drug Cost
116
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 4,673
- Total Day Supply
- 137,511
- Brand vs Generic
- 12% brand / 87% generic
- Brand Drug Cost
- $110K
- Generic Drug Cost
- $36K
- Antibiotic Claims
- 46
Patient Demographics
- Average Patient Age
- 79.7 years
- Avg HCC Risk Score
- 1.54
- Gender Split
- 47% female / 53% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Vijay Chaku, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Amlodipine Besylate
Amlodipine Besylate
207 claims
- Atorvastatin Calcium
Atorvastatin Calcium
108 claims
- Simvastatin 78
Simvastatin
78 claims
- Levothyroxine Sodium 67
Levothyroxine Sodium
67 claims
- Lisinopril 64
Lisinopril
64 claims
- Metoprolol Succinate 61
Metoprolol Succinate
61 claims
- Furosemide 60
Furosemide
60 claims
- Metformin Hcl 59
Metformin Hcl
59 claims
| Drug | Claims |
|---|---|
| Amlodipine Besylate | 207 |
| Atorvastatin Calcium | 108 |
| Simvastatin | 78 |
| Levothyroxine Sodium | 67 |
| Lisinopril | 64 |
| Metoprolol Succinate | 61 |
| Furosemide | 60 |
| Metformin Hcl | 59 |
| Pantoprazole Sodium | 51 |
| Potassium Chloride | 44 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Critical Care Medicine (Internal Medicine) Physician in MI →
All providers in Michigan →
Compare specialties →
Critical Care Medicine (Internal Medicine) Physician Overview
How Vijay Chaku, MD fits within the Critical Care Medicine (Internal Medicine) Physician landscape nationally.
6,646
Critical Care Medicine (Internal Medicine) Physician Providers in US
53
States with Critical Care Medicine (Internal Medicine) Physician
1,069
Avg Claims per Provider
Vijay Chaku, MD's 1,885 claims are above the specialty average of 1,069.
Nearby Critical Care Medicine (Internal Medicine) Physician Providers in Michigan
Other clinicians with the same primary specialty enrolled in Michigan, drawn from the same CMS NPPES roster as Chaku.
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 Michigan medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Critical Care 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.
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Frequently Asked Questions
What is Vijay Chaku, MD's specialty? ▼
Vijay Chaku, MD specializes in Critical Care Medicine (Internal Medicine) Physician and practices in Saginaw, Michigan. Credentials: MD.
How much does Vijay Chaku, MD prescribe under Medicare Part D? ▼
In 2023, Vijay Chaku, MD wrote 1,885 Medicare Part D claims totaling $148K in drug costs for 116 beneficiaries.
Where is Vijay Chaku, MD located? ▼
Vijay Chaku, MD is located at 3400 SHATTUCK RD, Saginaw, MI, 48603. Phone: (989) 791-2512.
What is Vijay Chaku, MD's NPI number? ▼
Vijay Chaku, MD's National Provider Identifier (NPI) is 1700823127, issued on 06/02/2006.
Does Vijay Chaku, MD prescribe more brand-name or generic drugs? ▼
Vijay Chaku, MD's prescribing is 12% brand-name and 87% generic drugs by claim count, with $110K in brand drug costs.
How many Critical Care Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 6,646 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 Vijay Chaku, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Vijay Chaku, MD's most frequently prescribed drugs include Amlodipine Besylate, Atorvastatin Calcium, Simvastatin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Vijay Chaku, MD accept Medicare? ▼
Vijay Chaku, MD appears in CMS Medicare data with 1,885 Part D claims and 116 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Vijay Chaku, MD's credentials? ▼
Vijay Chaku, MD's NPI is 1700823127 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
Compiled from official public sources by the PlainDoctor editorial team.
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.