NPI registry status
Active
2026 NPPES data Physical Medicine & Rehabilitation Physician NPI 1790853117 MD
Verify on CMS → Spencer Tseng, MD
Physical Medicine & Rehabilitation Physician in Mc Lean, Virginia.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 15,336 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
922
Medicare Part D claims · 327 beneficiaries · Physical Medicine & Rehabilitation Physician avg: 781
Industry payments
$96
1 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Spencer Tseng, MD filed 922 Medicare Part D claims in 2023 as a Physical Medicine & Rehabilitation Physician in Mc Lean, Virginia.
- 922
- 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.
Spencer Tseng, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
922 Top 25% higher than 75% 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 certification likely (heuristic, not verified)
Spencer Tseng, 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 Spencer Tseng, MD?
Quality data not reportedPrimary specialty
Physical Medicine & Rehabilitation Physician
Medicare Part D claims
922 18% vs specialty avg
Specialty distribution in Virginia
How Physical Medicine & Rehabilitation Physician compares to other specialties among Virginia 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).
Spencer Tseng, MD appears in the CMS NPPES registry as a Physical Medicine & Rehabilitation Physician provider holding MD credentials at 8008 WESTPARK DR, Mc Lean, VA, 22102, with a listed phone of (703) 287-4675. NPI 1790853117 was issued on 12/01/2006.
Medicare Part D records for calendar year 2023 show 922 prescription claims written by this provider, covering 327 Medicare beneficiaries and totaling roughly $11K in drug spend, with an opioid prescribing rate of 2.8%.
Physical Medicine & Rehabilitation Physician is a mid-sized specialty nationwide, with 15,336 enrolled providers across 54 states and an average of 781 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 | 1790853117 |
|---|---|
| Specialty | Physical Medicine & Rehabilitation Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 12/01/2006 |
Hospital and facility affiliations
Facilities where Spencer Tseng, 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.
Kaiser Foundation Health Plan OF The Mid Atlantic States, Inc
Woodbridge, VA
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 Spencer Tseng, MD. Source: openpaymentsdata.cms.gov.
Total received
$96
Largest payer
Inspire Medical Systems, Inc.
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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
922
Total Claims
$11K
Total Drug Cost
327
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,100
- Total Day Supply
- 29,137
- Generic Drug Cost
- $11K
- Opioid Claims
- 26 (2.8% rate)
Patient Demographics
- Average Patient Age
- 72.6 years
- Avg HCC Risk Score
- 0.99
- Gender Split
- 58% female / 42% male
- Age Distribution
- <65: 20, 65-74: 189, 75-84: 104, 85+: 14
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Spencer Tseng, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Gabapentin
Gabapentin
253 claims
- Methylprednisolone
Methylprednisolone
148 claims
- Duloxetine Hcl
Duloxetine Hcl
131 claims
- Baclofen
Baclofen
119 claims
- Pregabalin 92
Pregabalin
92 claims
- Tizanidine Hcl 45
Tizanidine Hcl
45 claims
- Meloxicam 33
Meloxicam
33 claims
- Diclofenac Sodium 24
Diclofenac Sodium
24 claims
| Drug | Claims |
|---|---|
| Gabapentin | 253 |
| Methylprednisolone | 148 |
| Duloxetine Hcl | 131 |
| Baclofen | 119 |
| Pregabalin | 92 |
| Tizanidine Hcl | 45 |
| Meloxicam | 33 |
| Diclofenac Sodium | 24 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 13 |
| Methocarbamol | 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 VA →
All providers in Virginia →
Compare specialties →
Physical Medicine & Rehabilitation Physician Overview
How Spencer Tseng, MD fits within the Physical Medicine & Rehabilitation Physician landscape nationally.
15,336
Physical Medicine & Rehabilitation Physician Providers in US
54
States with Physical Medicine & Rehabilitation Physician
781
Avg Claims per Provider
Spencer Tseng, MD's 922 claims are above the specialty average of 781.
Nearby Physical Medicine & Rehabilitation Physician Providers in Virginia
Other clinicians with the same primary specialty enrolled in Virginia, drawn from the same CMS NPPES roster as Tseng.
Dr. Jessalynn Adam
MD
Alexandria, VA
Dr. David Alcantara
M.D.
Portsmouth, VA
Dr. Jaison Alderman
PT, DPT
Great Falls, VA
Dr. Susan Alexander
PT
Harrisonburg, VA
Alan Alfano
Charlottesville, VA
Compare Physical Medicine & Rehabilitation Physician nationally: see state-by-state distribution →
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 Virginia medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Physical Medicine & Rehabilitation 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.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Virginia
Frequently Asked Questions
What is Spencer Tseng, MD's specialty? ▼
Spencer Tseng, MD specializes in Physical Medicine & Rehabilitation Physician and practices in Mc Lean, Virginia. Credentials: MD.
How much does Spencer Tseng, MD prescribe under Medicare Part D? ▼
In 2023, Spencer Tseng, MD wrote 922 Medicare Part D claims totaling $11K in drug costs for 327 beneficiaries.
Where is Spencer Tseng, MD located? ▼
Spencer Tseng, MD is located at 8008 WESTPARK DR, Mc Lean, VA, 22102. Phone: (703) 287-4675.
What is Spencer Tseng, MD's NPI number? ▼
Spencer Tseng, MD's National Provider Identifier (NPI) is 1790853117, issued on 12/01/2006.
Does Spencer Tseng, MD prescribe opioids? ▼
Yes, Spencer Tseng, MD had 26 opioid claims in 2023 with an opioid prescribing rate of 2.8%.
How many Physical Medicine & Rehabilitation Physician providers are there in the US? ▼
There are 15,336 Physical Medicine & Rehabilitation Physician providers across 54 states in the US. The average Physical Medicine & Rehabilitation Physician provider writes 781 Medicare Part D claims per year.
What drugs does Spencer Tseng, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Spencer Tseng, MD's most frequently prescribed drugs include Gabapentin, Methylprednisolone, Duloxetine Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Spencer Tseng, MD accept Medicare? ▼
Spencer Tseng, MD appears in CMS Medicare data with 922 Part D claims and 327 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Spencer Tseng, MD's credentials? ▼
Spencer Tseng, MD's NPI is 1790853117 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.