NPI registry status
Active
2026 NPPES data Physical Medicine & Rehabilitation Physician NPI 1447419601 MD
Verify on CMS → Phong Kieu, MD
Physical Medicine & Rehabilitation Physician in Worcester, Massachusetts.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 15,618 in Physical Medicine & Rehabilitation 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
242
Medicare Part D claims · 79 beneficiaries · Physical Medicine & Rehabilitation Physician avg: 793
Generic prescribing
93%
generic claims · 7% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Phong Kieu, MD filed 242 Medicare Part D claims in 2024 as a Physical Medicine & Rehabilitation Physician in Worcester, Massachusetts, prescribing 93% generic.
- 242
- Part D claims, 2024
- 93%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥48th
- pct by Part D claim volume (lower-bound band)
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 Phong Kieu, MD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1447419601), first enumerated 06/03/2008.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 242 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- State context
State board disciplinary context
Massachusetts statewide board action statistics are published annually — these figures describe aggregate state activity, not Phong Kieu, MD's individual license status. Verify directly with the state medical board.
Source: BORIM annual report 2023
- 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 1447419601 · Physical Medicine & Rehabilitation Physician
NPI-10 · ENUM-MID · TAX-MID · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1447419601
- ENUM-MID 2008
- TAX-MID 16K Physical Medicine
- RX-LIGHT 242
- BOOK-THIN 346 in Massachusetts
- PHOTO-ENUM Tae Hwan Chung · 2008
Phong Kieu, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
242 ≥ 48th percentile 48% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Phong Kieu, MD 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).
What does the federal data show about Phong Kieu, MD?
Quality data not reportedPrimary specialty
Physical Medicine & Rehabilitation Physician
Medicare Part D claims
242 69% vs specialty avg
Specialty distribution in Massachusetts
How Physical Medicine & Rehabilitation Physician compares to other specialties among Massachusetts 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 Physical Medicine & Rehabilitation 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 | 1447419601 |
|---|---|
| Specialty | Physical Medicine & Rehabilitation Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 06/03/2008 |
Hospital and facility affiliations
Facilities where Phong Kieu, MD 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.
Reliant Medical Group Inc
Worcester, MA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - Massachusetts BORIM 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 ~38K Massachusetts medical licensees in 2023 - they are NOT specific to Phong Kieu, MD. To verify Phong Kieu, MD's current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases
BORIM 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 Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Generic-heavy
Phong Kieu, MD - brand share 7.0%
Physical Medicine & Rehabilitation Physician average
7% brand-name claims vs 93% generic, on 242 2024 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 2024.
242
Total Claims
$3K
Total Drug Cost
79
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 282
- Total Day Supply
- 7,180
- Brand vs Generic
- 7% brand / 93% generic
- Brand Drug Cost
- $987
- Generic Drug Cost
- $2K
Patient Demographics
- Average Patient Age
- 71.5 years
- Avg HCC Risk Score
- 1.75
- Gender Split
- 76% female / 24% male
- Age Distribution
- <65: 19, 65-74: 27, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Phong Kieu, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Cyclobenzaprine Hcl
Cyclobenzaprine Hcl
58 claims
- Gabapentin
Gabapentin
43 claims
- Ibuprofen
Ibuprofen
29 claims
- Lidocaine
Lidocaine
26 claims
- Methylprednisolone 16
Methylprednisolone
16 claims
- Prednisone 15
Prednisone
15 claims
- Baclofen 13
Baclofen
13 claims
| Drug | Claims |
|---|---|
| Cyclobenzaprine Hcl | 58 |
| Gabapentin | 43 |
| Ibuprofen | 29 |
| Lidocaine | 26 |
| Methylprednisolone | 16 |
| Prednisone | 15 |
| Baclofen | 13 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Physical Medicine & Rehabilitation Physician in MA →
All providers in Massachusetts →
Compare specialties →
Physical Medicine & Rehabilitation Physician Overview
How Phong Kieu, MD fits within the Physical Medicine & Rehabilitation Physician landscape nationally.
15,618
Physical Medicine & Rehabilitation Physician Providers in US
54
States with Physical Medicine & Rehabilitation Physician
793
Avg Claims per Provider
Phong Kieu, MD's 242 claims are below the specialty average of 793.
Nationwide Physical Medicine & Rehabilitation Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Kieu, both outside Massachusetts so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2008)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Physical Medicine & Rehabilitation Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Kieu.
One of 346 Physical Medicine & Rehabilitation Physician providers enrolled in Massachusetts, 5 are shown here.
Dr. Scott Abramson
MD
E Sandwich, MA
Dr. Marc Adams
D.O.
Swansea, MA
Dr. Wiaam Ahmed
M.D
Worcester, MA
Dr. Michelle Joyce Alpert
M.D.
Boston, MA
Dr. Parakrama Ananta
M.D.
Fall River, MA
Compare Physical Medicine & Rehabilitation Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Phong Kieu, MD's specialty? ▼
Phong Kieu, MD specializes in Physical Medicine & Rehabilitation Physician and practices in Worcester, Massachusetts. Credentials: MD.
How much does Phong Kieu, MD prescribe under Medicare Part D? ▼
In 2024, Phong Kieu, MD wrote 242 Medicare Part D claims totaling $3K in drug costs for 79 beneficiaries.
Where is Phong Kieu, MD located? ▼
Phong Kieu, MD is located at 123 SUMMER ST STE 320S, Worcester, MA, 01608. Phone: (508) 964-5580.
What is Phong Kieu, MD's NPI number? ▼
Phong Kieu, MD's National Provider Identifier (NPI) is 1447419601, issued on 06/03/2008.
Does Phong Kieu, MD prescribe more brand-name or generic drugs? ▼
Phong Kieu, MD's prescribing is 7% brand-name and 93% generic drugs by claim count, with $987 in brand drug costs.
How many Physical Medicine & Rehabilitation Physician providers are there in the US? ▼
There are 15,618 Physical Medicine & Rehabilitation Physician providers across 54 states in the US. The average Physical Medicine & Rehabilitation Physician provider writes 793 Medicare Part D claims per year.
What drugs does Phong Kieu, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Phong Kieu, MD's most frequently prescribed drugs include Cyclobenzaprine Hcl, Gabapentin, Ibuprofen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Phong Kieu, MD accept Medicare? ▼
Phong Kieu, MD appears in CMS Medicare data with 242 Part D claims and 79 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Phong Kieu, MD's credentials? ▼
Phong Kieu, MD's NPI is 1447419601 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 (2024). 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 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.