NPI registry status
Active
2026 NPPES data Geriatric Medicine (Internal Medicine) Physician NPI 1417040114 M. D.
Verify on CMS → Tony Tang, M. D.
Geriatric Medicine (Internal Medicine) Physician in St. Louis, Missouri.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 4,171 in Geriatric 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
21K
Medicare Part D claims · 495 beneficiaries · Geriatric Medicine (Internal Medicine) Physician avg: 4K
Generic prescribing
82%
generic claims · 17% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
18/100
▼ 65 pts below national avg 83.1 · Penalty band
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
Tony Tang, M. D. reported a CMS MIPS final score of 18/100 - below the 83.1 national average - and filed 20,804 Medicare Part D claims in 2023.
- 18/100
- MIPS score · -65 vs avg
- 21K
- Part D claims, 2023
- 82%
- generic prescribing
- 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.
Tony Tang, M. D.'s MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
18 2nd percentile higher than 2% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023
Where Tony Tang, M. D. sits
This provider among geriatric medicine (internal medicine) physician peers
Across the 724 geriatric medicine (internal medicine) physician providers who report both Medicare Part D prescribing and a MIPS quality score, Tony Tang, M. D. writes more Part D claims than 95% of them and scores higher on MIPS quality than 4% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one geriatric medicine (internal medicine) physician peer from a representative sample of 60; the gold marker is Tony Tang, M. D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Tony Tang, M. D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 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 Tony Tang, M. D.?
Below national averagePrimary specialty
Geriatric Medicine (Internal Medicine) Physician
Medicare Part D claims
20,804 368% vs specialty avg
MIPS final score
18/100 65.1 pts vs avg
Specialty distribution in Missouri
How Geriatric Medicine (Internal Medicine) Physician compares to other specialties among Missouri providers
Medicare quality performance, MIPS
Tony Tang, M. D.'s 2023 MIPS final score plotted against the Geriatric Medicine (Internal Medicine) Physician national average
- MIPS Final Score
- 18/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Geriatric Medicine (Internal Medicine) Physician) - 18/100 vs national avg 83.1
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).
Tony Tang, M. D. appears in the CMS NPPES registry as a Geriatric Medicine (Internal Medicine) Physician provider holding M. D. credentials at 4675 SOUTH GRAND BLVD., St. Louis, MO, 63111, with a listed phone of (314) 752-8600. NPI 1417040114 was issued on 10/02/2006.
Medicare Part D records for calendar year 2023 show 20,804 prescription claims written by this provider, covering 495 Medicare beneficiaries and totaling roughly $1.7 million in drug spend, split 17% brand-name and 82% generic by claim count, with an opioid prescribing rate of 4.3%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 18/100 for the 2023 performance year (Quality 0, Cost 60.1), compared with the national average of 83.1.
Geriatric Medicine (Internal Medicine) Physician is a narrow specialty nationwide, with 4,171 enrolled providers across 52 states and an average of 4,450 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 | 1417040114 |
|---|---|
| Specialty | Geriatric Medicine (Internal Medicine) Physician |
| Credentials | M. D. |
| Gender | Male |
| NPI Issued | 10/02/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
18.0169
Final Score
Avg: 83.1
0
Quality
60.0563
Cost
Reporting: Individual
Hospital and facility affiliations
Facilities where Tony Tang, 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.
Geromed LLC
Saint Louis, MO
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Typical
Tony Tang, M. D. - brand share 17.0%
Geriatric Medicine (Internal Medicine) Physician average
17% brand-name claims vs 82% generic, on 20,804 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.
20,804
Total Claims
$1.7M
Total Drug Cost
495
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 22,597
- Total Day Supply
- 543,756
- Brand vs Generic
- 17% brand / 82% generic
- Brand Drug Cost
- $1.2M
- Generic Drug Cost
- $495K
- Opioid Claims
- 890 (4.3% rate)
- Antibiotic Claims
- 686
Patient Demographics
- Average Patient Age
- 72.8 years
- Avg HCC Risk Score
- 2.71
- Gender Split
- 50% female / 50% male
- Age Distribution
- <65: 95, 65-74: 180, 75-84: 150, 85+: 70
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Tony Tang, M. D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
1,068 claims
- Levothyroxine Sodium
Levothyroxine Sodium
860 claims
- Amlodipine Besylate
Amlodipine Besylate
696 claims
- Eliquis
Eliquis
604 claims
- Gabapentin
Gabapentin
511 claims
- Furosemide
Furosemide
457 claims
- Mirtazapine 409
Mirtazapine
409 claims
- Lisinopril 396
Lisinopril
396 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 1,068 |
| Levothyroxine Sodium | 860 |
| Amlodipine Besylate | 696 |
| Eliquis Apixaban | 604 |
| Gabapentin | 511 |
| Furosemide | 457 |
| Mirtazapine | 409 |
| Lisinopril | 396 |
| Pantoprazole Sodium | 389 |
| Trazodone Hcl | 388 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Geriatric Medicine (Internal Medicine) Physician in MO →
All providers in Missouri →
Compare specialties →
Geriatric Medicine (Internal Medicine) Physician Overview
How Tony Tang, M. D. fits within the Geriatric Medicine (Internal Medicine) Physician landscape nationally.
4,171
Geriatric Medicine (Internal Medicine) Physician Providers in US
52
States with Geriatric Medicine (Internal Medicine) Physician
4,450
Avg Claims per Provider
Tony Tang, M. D.'s 20,804 claims are above the specialty average of 4,450.
Nearby Geriatric Medicine (Internal Medicine) Physician Providers in Missouri
Other clinicians with the same primary specialty enrolled in Missouri, drawn from the same CMS NPPES roster as Tang.
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 Missouri medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Geriatric 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 Tony Tang, M. D.'s specialty? ▼
Tony Tang, M. D. specializes in Geriatric Medicine (Internal Medicine) Physician and practices in St. Louis, Missouri. Credentials: M. D..
How much does Tony Tang, M. D. prescribe under Medicare Part D? ▼
In 2023, Tony Tang, M. D. wrote 20,804 Medicare Part D claims totaling $1.7M in drug costs for 495 beneficiaries.
What is Tony Tang, M. D.'s Medicare quality score? ▼
Tony Tang, M. D. has a CMS MIPS Final Score of 18/100 (Quality: 0, Cost: 60.1). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Tony Tang, M. D. located? ▼
Tony Tang, M. D. is located at 4675 SOUTH GRAND BLVD., St. Louis, MO, 63111. Phone: (314) 752-8600.
What is Tony Tang, M. D.'s NPI number? ▼
Tony Tang, M. D.'s National Provider Identifier (NPI) is 1417040114, issued on 10/02/2006.
Does Tony Tang, M. D. prescribe more brand-name or generic drugs? ▼
Tony Tang, M. D.'s prescribing is 17% brand-name and 82% generic drugs by claim count, with $1.2M in brand drug costs.
Does Tony Tang, M. D. prescribe opioids? ▼
Yes, Tony Tang, M. D. had 890 opioid claims in 2023 with an opioid prescribing rate of 4.3%.
How many Geriatric Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 4,171 Geriatric Medicine (Internal Medicine) Physician providers across 52 states in the US. The average Geriatric Medicine (Internal Medicine) Physician provider writes 4,450 Medicare Part D claims per year.
What drugs does Tony Tang, M. D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Tony Tang, M. D.'s most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Tony Tang, M. D. accept Medicare? ▼
Tony Tang, M. D. appears in CMS Medicare data with 20,804 Part D claims and 495 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Tony Tang, M. D.'s credentials? ▼
Tony Tang, M. D.'s NPI is 1417040114 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.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.