2026 NPPES data Plastic Surgery within the Head & Neck (Otolaryngology) Physician NPI 1447327325 MD
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GUIOMAR IRIARTE, MD

Plastic Surgery within the Head & Neck (Otolaryngology) Physician in BELLFLOWER, 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
446
Medicare Part D claims · 212 beneficiaries · Plastic Surgery within the Head & Neck (Otolaryngology) Physician avg: 379
Generic prescribing
92%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

GUIOMAR IRIARTE, MD filed 446 Medicare Part D claims in 2023 as a Plastic Surgery within the Head & Neck (Otolaryngology) Physician in BELLFLOWER, California, prescribing 92% generic.

446
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.

GUIOMAR IRIARTE, MD's Medicare Part D volume vs every U.S. prescriber

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

446 Top 38% higher than 62% 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%). This entry sits in this band. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 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)

GUIOMAR IRIARTE, 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 GUIOMAR IRIARTE, MD?

Quality data not reported

NPI registry status

Active

Issued 11/29/2006

NPI 1447327325

Primary specialty

Plastic Surgery within the Head & Neck (Otolaryngology) Physician

Niche

608 US NPIs in this specialty

Medicare Part D claims

446 18% vs specialty avg

2023 prescription claims

Specialty avg: 379

Specialty distribution in California

How Plastic Surgery within the Head & Neck (Otolaryngology) Physician compares to other specialties among California providers

California providers

Plastic Surgery within the Head & Neck (Otolaryngology) Physician share within California

1. Plastic Surgery within the Head & Neck (Otolaryngology) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Plastic Surgery within the Head & Neck (Otolaryngology) Physician share within California

Specialty board-certification context

Estimated specialty board-certified rate — Plastic Surgery within the Head & Neck (Otolaryngology) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Plastic Surgery within the Head & Neck (Otolaryngology) Physician ABMS/AOA estimate

Est. board-certified rate (Plastic Surgery within the Head & Neck (Otolaryngology) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Plastic Surgery within the Head & Neck (Otolaryngology) 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).

GUIOMAR IRIARTE, MD appears in the CMS NPPES registry as a Plastic Surgery within the Head & Neck (Otolaryngology) Physician provider holding MD credentials at 9400 ROSECRANS AVE, BELLFLOWER, CA, 90706, with a listed phone of (562) 461-3000. NPI 1447327325 was issued on 11/29/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what IRIARTE 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 446 prescription claims written by this provider, covering 212 Medicare beneficiaries and totaling roughly $15K 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.

Plastic Surgery within the Head & Neck (Otolaryngology) Physician is a narrow specialty nationwide, with 608 enrolled providers across 48 states and an average of 379 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

9400 ROSECRANS AVE
BELLFLOWER, CA 90706

Provider Details

NPI 1447327325
Specialty Plastic Surgery within the Head & Neck (Otolaryngology) Physician
Credentials MD
Gender Female
NPI Issued 11/29/2006

Hospital and facility affiliations

Facilities where GUIOMAR IRIARTE, 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.

SOUTHERN CALIFORNIA PERMANENTE MEDICAL GROUP
BELLFLOWER, 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 GUIOMAR IRIARTE, MD. To verify GUIOMAR IRIARTE, MD'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

GUIOMAR IRIARTE, MD — brand share 8.0%
Specialty average (est.)

8% brand-name claims vs 92% generic, on 446 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.

446
Total Claims
$15K
Total Drug Cost
212
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
735
Total Day Supply
18,893
Brand vs Generic
8% brand / 92% generic
Brand Drug Cost
$2K
Generic Drug Cost
$13K
Antibiotic Claims
29

Patient Demographics

Average Patient Age
75.2 years
Avg HCC Risk Score
1.25
Gender Split
59% female / 41% male

Top Prescribed Drugs (Medicare Part D)

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

What GUIOMAR IRIARTE, 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
Fluticasone Propionate
58
Ipratropium Bromide
58
Betamethasone Valerate
35
Azelastine Hcl
29
Ciprofloxacin-Dexamethasone
Ciprofloxacin Hcl/Dexameth
28
Montelukast Sodium
27
Ibuprofen
21
Pantoprazole Sodium
15
Prednisone
15
Flunisolide
14

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

Plastic Surgery within the Head & Neck (Otolaryngology) Physician Overview

How GUIOMAR IRIARTE, MD fits within the Plastic Surgery within the Head & Neck (Otolaryngology) Physician landscape nationally.

608
Plastic Surgery within the Head & Neck (Otolaryngology) Physician Providers in US
48
States with Plastic Surgery within the Head & Neck (Otolaryngology) Physician
379
Avg Claims per Provider

GUIOMAR IRIARTE, MD's 446 claims are above the specialty average of 379.

Nearby Plastic Surgery within the Head & Neck (Otolaryngology) Physician Providers in California

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

Compare Plastic Surgery within the Head & Neck (Otolaryngology) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is GUIOMAR IRIARTE, MD's specialty?
GUIOMAR IRIARTE, MD specializes in Plastic Surgery within the Head & Neck (Otolaryngology) Physician and practices in BELLFLOWER, California. Credentials: MD.
How much does GUIOMAR IRIARTE, MD prescribe under Medicare Part D?
In 2023, GUIOMAR IRIARTE, MD wrote 446 Medicare Part D claims totaling $15K in drug costs for 212 beneficiaries.
Where is GUIOMAR IRIARTE, MD located?
GUIOMAR IRIARTE, MD is located at 9400 ROSECRANS AVE, BELLFLOWER, CA, 90706. Phone: (562) 461-3000.
What is GUIOMAR IRIARTE, MD's NPI number?
GUIOMAR IRIARTE, MD's National Provider Identifier (NPI) is 1447327325, issued on 11/29/2006.
Does GUIOMAR IRIARTE, MD prescribe more brand-name or generic drugs?
GUIOMAR IRIARTE, MD's prescribing is 8% brand-name and 92% generic drugs by claim count, with $2K in brand drug costs.
How many Plastic Surgery within the Head & Neck (Otolaryngology) Physician providers are there in the US?
There are 608 Plastic Surgery within the Head & Neck (Otolaryngology) Physician providers across 48 states in the US. The average Plastic Surgery within the Head & Neck (Otolaryngology) Physician provider writes 379 Medicare Part D claims per year.
What drugs does GUIOMAR IRIARTE, MD prescribe most often?
Based on 2023 Medicare Part D data, GUIOMAR IRIARTE, MD's most frequently prescribed drugs include Fluticasone Propionate, Ipratropium Bromide, Betamethasone Valerate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does GUIOMAR IRIARTE, MD accept Medicare?
GUIOMAR IRIARTE, MD appears in CMS Medicare data with 446 Part D claims and 212 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify GUIOMAR IRIARTE, MD's credentials?
GUIOMAR IRIARTE, MD's NPI is 1447327325 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.
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