2026 NPPES data Internal Medicine Physician NPI 1225415631 M.D.
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YU-XUAN DANG, M.D.

Internal Medicine Physician in MOUNTAIN VIEW, California. 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
4K
Medicare Part D claims · 388 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
94%
generic claims · 6% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$140
1 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

YU-XUAN DANG, M.D. filed 3,658 Medicare Part D claims in 2023 as a Internal Medicine Physician in MOUNTAIN VIEW, California, prescribing 94% generic.

4K
Part D claims, 2023
94%
generic prescribing
$140
industry payments (Sunshine Act)

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.

YU-XUAN DANG, M.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

3,658 Top 9% higher than 91% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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)

YU-XUAN DANG, M.D. 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 YU-XUAN DANG, M.D.?

Quality data not reported

NPI registry status

Active

Issued 05/05/2015

NPI 1225415631

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

3,658 35% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in California

How Internal Medicine Physician compares to other specialties among California providers

California providers

Internal Medicine Physician share within California

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

Specialty board-certification context

Estimated specialty board-certified rate — Internal Medicine Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Internal Medicine Physician ABMS/AOA estimate

Est. board-certified rate (Internal Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Internal Medicine Physician) — ABMS / AOA estimate

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).

YU-XUAN DANG, M.D. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding M.D. credentials at 2495 HOSPITAL DR, MOUNTAIN VIEW, CA, 94040, with a listed phone of (650) 988-8460. NPI 1225415631 was issued on 05/05/2015. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what DANG 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 3,658 prescription claims written by this provider, covering 388 Medicare beneficiaries and totaling roughly $247K in drug spend, split 6% brand-name and 94% generic by claim count, with an opioid prescribing rate of 0.3%. 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.

Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 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

2495 HOSPITAL DR
MOUNTAIN VIEW, CA 94040

Provider Details

NPI 1225415631
Specialty Internal Medicine Physician
Credentials M.D.
Gender Male
NPI Issued 05/05/2015

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 YU-XUAN DANG, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$140

Largest payer

ABBVIE 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.

License & disciplinary context — California MBC 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 ~150K California medical licensees in 2023 — they are NOT specific to YU-XUAN DANG, M.D.. To verify YU-XUAN DANG, M.D.'s current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases

MBC 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 California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Generic-heavy

YU-XUAN DANG, M.D. — brand share 6.0%
Specialty average (est.)

6% brand-name claims vs 94% generic, on 3,658 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.

3,658
Total Claims
$247K
Total Drug Cost
388
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
9,804
Total Day Supply
289,037
Brand vs Generic
6% brand / 94% generic
Brand Drug Cost
$147K
Generic Drug Cost
$98K
Opioid Claims
12 (0.3% rate)
Antibiotic Claims
46

Patient Demographics

Average Patient Age
74.9 years
Avg HCC Risk Score
0.95
Gender Split
44% female / 56% male

Top Prescribed Drugs (Medicare Part D)

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

What YU-XUAN DANG, M.D. 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
Atorvastatin Calcium
507
Losartan Potassium
287
Amlodipine Besylate
264
Rosuvastatin Calcium
206
Metformin Hcl Er
Metformin Hcl
116
Levothyroxine Sodium
105
Tamsulosin Hcl
92
Metformin Hcl
83
Lisinopril
73
Finasteride
68

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

Internal Medicine Physician Overview

How YU-XUAN DANG, M.D. fits within the Internal Medicine Physician landscape nationally.

172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider

YU-XUAN DANG, M.D.'s 3,658 claims are above the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in California

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

Compare Internal Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is YU-XUAN DANG, M.D.'s specialty?
YU-XUAN DANG, M.D. specializes in Internal Medicine Physician and practices in MOUNTAIN VIEW, California. Credentials: M.D..
How much does YU-XUAN DANG, M.D. prescribe under Medicare Part D?
In 2023, YU-XUAN DANG, M.D. wrote 3,658 Medicare Part D claims totaling $247K in drug costs for 388 beneficiaries.
Where is YU-XUAN DANG, M.D. located?
YU-XUAN DANG, M.D. is located at 2495 HOSPITAL DR, MOUNTAIN VIEW, CA, 94040. Phone: (650) 988-8460.
What is YU-XUAN DANG, M.D.'s NPI number?
YU-XUAN DANG, M.D.'s National Provider Identifier (NPI) is 1225415631, issued on 05/05/2015.
Does YU-XUAN DANG, M.D. prescribe more brand-name or generic drugs?
YU-XUAN DANG, M.D.'s prescribing is 6% brand-name and 94% generic drugs by claim count, with $147K in brand drug costs.
Does YU-XUAN DANG, M.D. prescribe opioids?
Yes, YU-XUAN DANG, M.D. had 12 opioid claims in 2023 with an opioid prescribing rate of 0.3%.
How many Internal Medicine Physician providers are there in the US?
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does YU-XUAN DANG, M.D. prescribe most often?
Based on 2023 Medicare Part D data, YU-XUAN DANG, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Losartan Potassium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does YU-XUAN DANG, M.D. accept Medicare?
YU-XUAN DANG, M.D. appears in CMS Medicare data with 3,658 Part D claims and 388 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify YU-XUAN DANG, M.D.'s credentials?
YU-XUAN DANG, M.D.'s NPI is 1225415631 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

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