2026 NPPES data Nephrology Physician NPI 1689698615 MD
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FREDERICK TAN, MD

Nephrology Physician in BRYAN, Texas. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
2K
Medicare Part D claims · 381 beneficiaries · Nephrology Physician avg: 1K
Generic prescribing
92%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
13.1453/100
▼ 70 pts below national avg 83.1 · [object Object]

What the federal data shows

FREDERICK TAN, MD reported a CMS MIPS final score of 13.1453/100 — below the 83.1 national average — and filed 2,190 Medicare Part D claims in 2023.

13.1453/100
MIPS score · -70 vs avg
2K
Part D claims, 2023
92%
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.

FREDERICK TAN, MD's MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023 — the federal quality measure

13 2nd percentile higher than 2% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). This entry sits in this band. 20–30: 3,069 scored providers (1%). Above this entry. 30–40: 2,746 scored providers (1%). Above this entry. 40–50: 2,928 scored providers (1%). Above this entry. 50–60: 5,882 scored providers (1%). Above this entry. 60–70: 13,906 scored providers (3%). Above this entry. 70–80: 118,074 scored providers (25%). Above this entry. 80–90: 129,887 scored providers (27%). Above this entry. 90–100: 189,403 scored providers (40%). Above this entry. This provider 0 100 every MIPS-scored clinician, bucketed by value

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

Board certification likely (heuristic — not verified)

FREDERICK TAN, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting — 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 FREDERICK TAN, MD?

Below national average

NPI registry status

Active

Issued 07/26/2006

NPI 1689698615

Primary specialty

Nephrology Physician

Mid-sized

10,534 US NPIs in this specialty

Medicare Part D claims

2,190 51% vs specialty avg

2023 prescription claims

Specialty avg: 1,454

MIPS final score

13.1453/100 69.95469999999999% pts

Penalty band band

vs 83.1 national avg

Specialty distribution in Texas

How Nephrology Physician compares to other specialties among Texas providers

Texas providers

Nephrology Physician share within Texas

1. Nephrology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Nephrology Physician share within Texas

Medicare quality performance — MIPS

FREDERICK TAN, MD's 2023 MIPS final score plotted against the Nephrology Physician national average

Below national average
MIPS Final Score
13.1453/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Nephrology Physician) — 13.1453/100 vs national avg 83.1

0%100%National avg83%13.1%
MIPS final score (Nephrology Physician) — 13.1453/100 vs national avg 83.1

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).

FREDERICK TAN, MD appears in the CMS NPPES registry as a Nephrology Physician provider holding MD credentials at 2801 E 29TH ST, BRYAN, TX, 77802, with a listed phone of (979) 774-3960. NPI 1689698615 was issued on 07/26/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what TAN most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 2,190 prescription claims written by this provider, covering 381 Medicare beneficiaries and totaling roughly $431K in drug spend, split 8% brand-name and 92% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 13.1453/100 for the 2023 performance year (Quality 0, Cost 43.8177), compared with the national average of 83.1.

Nephrology Physician is a mid-sized specialty nationwide, with 10,534 enrolled providers across 55 states and an average of 1,454 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

2801 E 29TH ST
BRYAN, TX 77802

Provider Details

NPI 1689698615
Specialty Nephrology Physician
Credentials MD
Gender Male
NPI Issued 07/26/2006

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

13.1453
Final Score
Avg: 83.1
0
Quality
43.8177
Cost

Reporting: Individual

License & disciplinary context — Texas TMB 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 ~77K Texas medical licensees in 2023 — they are NOT specific to FREDERICK TAN, MD. To verify FREDERICK TAN, MD's current license status, search the TMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

344
Total board actions, Texas 2023
Across 334 cases
4.47
Actions per 1,000 licensees
Texas statewide rate
probation
Most common action type
94 cases

TMB 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 Texas disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Generic-heavy

FREDERICK TAN, MD — brand share 8.0%
Specialty average (est.)

8% brand-name claims vs 92% generic, on 2,190 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.

2,190
Total Claims
$431K
Total Drug Cost
381
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
4,991
Total Day Supply
147,484
Brand vs Generic
8% brand / 92% generic
Brand Drug Cost
$314K
Generic Drug Cost
$117K
Antibiotic Claims
57

Patient Demographics

Average Patient Age
72.5 years
Avg HCC Risk Score
4.05
Gender Split
49% female / 51% male
Age Distribution
<65: 72, 65-74: 131, 75-84: 133, 85+: 45

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What FREDERICK TAN, MD prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Calcitriol
428
Nifedipine Er
Nifedipine
151
Sevelamer Carbonate
128
Clonidine Hcl
122
Losartan Potassium
113
Amlodipine Besylate
100
Hydralazine Hcl
94
Carvedilol
62
Metoprolol Succinate
60
Velphoro
Sucroferric Oxyhydroxide
57

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Nephrology Physician Overview

How FREDERICK TAN, MD fits within the Nephrology Physician landscape nationally.

10,534
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,454
Avg Claims per Provider

FREDERICK TAN, MD's 2,190 claims are above the specialty average of 1,454.

Nearby Nephrology Physician Providers in Texas

Other clinicians with the same primary specialty enrolled in Texas, drawn from the same CMS NPPES roster as TAN.

Compare Nephrology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is FREDERICK TAN, MD's specialty?
FREDERICK TAN, MD specializes in Nephrology Physician and practices in BRYAN, Texas. Credentials: MD.
How much does FREDERICK TAN, MD prescribe under Medicare Part D?
In 2023, FREDERICK TAN, MD wrote 2,190 Medicare Part D claims totaling $431K in drug costs for 381 beneficiaries.
What is FREDERICK TAN, MD's Medicare quality score?
FREDERICK TAN, MD has a CMS MIPS Final Score of 13.1453/100 (Quality: 0, Cost: 43.8177). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is FREDERICK TAN, MD located?
FREDERICK TAN, MD is located at 2801 E 29TH ST, BRYAN, TX, 77802. Phone: (979) 774-3960.
What is FREDERICK TAN, MD's NPI number?
FREDERICK TAN, MD's National Provider Identifier (NPI) is 1689698615, issued on 07/26/2006.
Does FREDERICK TAN, MD prescribe more brand-name or generic drugs?
FREDERICK TAN, MD's prescribing is 8% brand-name and 92% generic drugs by claim count, with $314K in brand drug costs.
How many Nephrology Physician providers are there in the US?
There are 10,534 Nephrology Physician providers across 55 states in the US. The average Nephrology Physician provider writes 1,454 Medicare Part D claims per year.
What drugs does FREDERICK TAN, MD prescribe most often?
Based on 2023 Medicare Part D data, FREDERICK TAN, MD's most frequently prescribed drugs include Calcitriol, Nifedipine Er, Sevelamer Carbonate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does FREDERICK TAN, MD accept Medicare?
FREDERICK TAN, MD appears in CMS Medicare data with 2,190 Part D claims and 381 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify FREDERICK TAN, MD's credentials?
FREDERICK TAN, MD's NPI is 1689698615 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

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