2026 NPPES data General Practice Physician NPI 1356327134 D.O.
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DANIEL HUYNH, D.O.

General Practice Physician in LONG BEACH, 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
2K
Medicare Part D claims · 933 beneficiaries · General Practice Physician avg: 3K
Generic prescribing
97%
generic claims · 3% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

DANIEL HUYNH, D.O. filed 1,763 Medicare Part D claims in 2023 as a General Practice Physician in LONG BEACH, California, prescribing 97% generic.

2K
Part D claims, 2023
97%
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.

DANIEL HUYNH, D.O.'s Medicare Part D volume vs every U.S. prescriber

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

1,763 Top 17% higher than 83% 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%). This entry sits in this band. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. 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 certification likely (heuristic — not verified)

DANIEL HUYNH, D.O. 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 DANIEL HUYNH, D.O.?

Quality data not reported

NPI registry status

Active

Issued 12/22/2005

NPI 1356327134

Primary specialty

General Practice Physician

Mid-sized

16,677 US NPIs in this specialty

Medicare Part D claims

1,763 39% vs specialty avg

2023 prescription claims

Specialty avg: 2,872

Specialty distribution in California

How General Practice Physician compares to other specialties among California providers

California providers

General Practice Physician share within California

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

Specialty board-certification context

Estimated specialty board-certified rate — General Practice Physician (ABMS / AOA reference)

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

Est. board-certified rate (General Practice Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (General Practice 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).

DANIEL HUYNH, D.O. appears in the CMS NPPES registry as a General Practice Physician provider holding D.O. credentials at 2600 REDONDO AVE, LONG BEACH, CA, 90806, with a listed phone of (562) 988-7000. NPI 1356327134 was issued on 12/22/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what HUYNH 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 1,763 prescription claims written by this provider, covering 933 Medicare beneficiaries and totaling roughly $26K in drug spend, split 3% brand-name and 97% generic by claim count, with an opioid prescribing rate of 5.3%. 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.

General Practice Physician is a mid-sized specialty nationwide, with 16,677 enrolled providers across 56 states and an average of 2,872 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

2600 REDONDO AVE
LONG BEACH, CA 90806

Provider Details

NPI 1356327134
Specialty General Practice Physician
Credentials D.O.
Gender Male
NPI Issued 12/22/2005

Hospital and facility affiliations

Facilities where DANIEL HUYNH, D.O. 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.

SOUTHERN CALIFORNIA PERMANENTE MEDICAL GROUP
BALDWIN PARK, CA

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 — 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 DANIEL HUYNH, D.O.. To verify DANIEL HUYNH, D.O.'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

DANIEL HUYNH, D.O. — brand share 3.0%
Specialty average (est.)

3% brand-name claims vs 97% generic, on 1,763 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.

1,763
Total Claims
$26K
Total Drug Cost
933
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,859
Total Day Supply
20,218
Brand vs Generic
3% brand / 97% generic
Brand Drug Cost
$10K
Generic Drug Cost
$15K
Opioid Claims
93 (5.3% rate)
Antibiotic Claims
610

Patient Demographics

Average Patient Age
73.7 years
Avg HCC Risk Score
1.78
Gender Split
61% female / 39% male
Age Distribution
<65: 78, 65-74: 435, 75-84: 316, 85+: 104

Top Prescribed Drugs (Medicare Part D)

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

What DANIEL HUYNH, D.O. 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
Prednisone
210
Naproxen
101
Amoxicillin-Clavulanate Potass
Amoxicillin/Potassium Clav
91
Ciprofloxacin Hcl
86
Doxycycline Hyclate
84
Azithromycin
83
Cephalexin
76
Doxycycline Monohydrate
74
Acetaminophen-Codeine
Acetaminophen With Codeine
63
Albuterol Sulfate Hfa
Albuterol Sulfate
55

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

General Practice Physician Overview

How DANIEL HUYNH, D.O. fits within the General Practice Physician landscape nationally.

16,677
General Practice Physician Providers in US
56
States with General Practice Physician
2,872
Avg Claims per Provider

DANIEL HUYNH, D.O.'s 1,763 claims are below the specialty average of 2,872.

Nearby General Practice Physician Providers in California

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

Compare General Practice Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is DANIEL HUYNH, D.O.'s specialty?
DANIEL HUYNH, D.O. specializes in General Practice Physician and practices in LONG BEACH, California. Credentials: D.O..
How much does DANIEL HUYNH, D.O. prescribe under Medicare Part D?
In 2023, DANIEL HUYNH, D.O. wrote 1,763 Medicare Part D claims totaling $26K in drug costs for 933 beneficiaries.
Where is DANIEL HUYNH, D.O. located?
DANIEL HUYNH, D.O. is located at 2600 REDONDO AVE, LONG BEACH, CA, 90806. Phone: (562) 988-7000.
What is DANIEL HUYNH, D.O.'s NPI number?
DANIEL HUYNH, D.O.'s National Provider Identifier (NPI) is 1356327134, issued on 12/22/2005.
Does DANIEL HUYNH, D.O. prescribe more brand-name or generic drugs?
DANIEL HUYNH, D.O.'s prescribing is 3% brand-name and 97% generic drugs by claim count, with $10K in brand drug costs.
Does DANIEL HUYNH, D.O. prescribe opioids?
Yes, DANIEL HUYNH, D.O. had 93 opioid claims in 2023 with an opioid prescribing rate of 5.3%.
How many General Practice Physician providers are there in the US?
There are 16,677 General Practice Physician providers across 56 states in the US. The average General Practice Physician provider writes 2,872 Medicare Part D claims per year.
What drugs does DANIEL HUYNH, D.O. prescribe most often?
Based on 2023 Medicare Part D data, DANIEL HUYNH, D.O.'s most frequently prescribed drugs include Prednisone, Naproxen, Amoxicillin-Clavulanate Potass. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does DANIEL HUYNH, D.O. accept Medicare?
DANIEL HUYNH, D.O. appears in CMS Medicare data with 1,763 Part D claims and 933 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify DANIEL HUYNH, D.O.'s credentials?
DANIEL HUYNH, D.O.'s NPI is 1356327134 with credentials D.O.. 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