2026 NPPES data Optometrist NPI 1609445451 OD
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ALFONSO SITENGA, OD

Optometrist in KENAI, Alaska. 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
583
Medicare Part D claims · 247 beneficiaries · Optometrist avg: 257
Generic prescribing
67%
generic claims · 33% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
91.3071/100
▲ 8 pts above national avg 83.1 · [object Object]
What the federal data reveals: ALFONSO SITENGA, OD is a Optometrist ([object Object]) practicing in KENAI, Alaska with a Medicare Part D prescribing footprint of 583 claims across 247 beneficiaries — 33% brand-name prescribing . Their CMS MIPS Final Score of 91.3071/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities .

What stands out: ALFONSO SITENGA, OD reported a CMS MIPS final score of 91.3071 out of 100, above the 83.1 national average, and filed 583 Medicare Part D claims in 2023. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

ALFONSO SITENGA, OD at a glance

High performer (top quartile)

NPI registry status

Active

Issued 06/24/2021

NPI 1609445451

Primary specialty

Optometrist

High-volume

60,463 US NPIs in this specialty

Medicare Part D claims

583 127% vs specialty avg

2023 prescription claims

Specialty avg: 257

MIPS final score

91.3071/100 8.207100000000011% pts

Exceptional band

vs 83.1 national avg

Specialty distribution in Alaska

How Optometrist compares to other specialties among Alaska providers

Alaska providers

Optometrist share within Alaska

1. Optometrist42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Optometrist share within Alaska

Medicare quality performance — MIPS

ALFONSO SITENGA, OD's 2023 MIPS final score plotted against the Optometrist national average

High performer (top quartile)
MIPS Final Score
91.3071/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Optometrist) — 91.3071/100 vs national avg 83.1

0%100%National avg83%91.3%
MIPS final score (Optometrist) — 91.3071/100 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).

ALFONSO SITENGA, OD is a Optometrist provider practicing in KENAI, Alaska, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: OD. NPI: 1609445451. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

ALFONSO SITENGA, OD appears in the CMS NPPES registry as a Optometrist provider holding OD credentials at 115 BIDARKA ST, KENAI, AK, 99611, with a listed phone of (907) 335-3358. NPI 1609445451 was issued on 06/24/2021. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what SITENGA 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 583 prescription claims written by this provider, covering 247 Medicare beneficiaries and totaling roughly $52K in drug spend, split 33% brand-name and 67% 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 91.3071/100 for the 2023 performance year (Quality 82.6142), compared with the national average of 83.1.

Optometrist is a high-volume specialty nationwide, with 60,463 enrolled providers across 56 states and an average of 257 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

115 BIDARKA ST
KENAI, AK 99611

Provider Details

NPI 1609445451
Specialty Optometrist
Credentials OD
Gender Male
NPI Issued 06/24/2021

CMS Quality Score (MIPS)

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

91.3071
Final Score
Avg: 83.1
82.6142
Quality

Reporting: Individual

Hospital and facility affiliations

Facilities where ALFONSO SITENGA, OD 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.

SITENGA EYE ASSOCIATES LLC
KENAI, AK

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 · Above average

ALFONSO SITENGA, OD — brand share 33.0%
Specialty average (est.)

33% brand-name claims vs 67% generic, on 583 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.

583
Total Claims
$52K
Total Drug Cost
247
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,014
Total Day Supply
28,188
Brand vs Generic
33% brand / 67% generic
Brand Drug Cost
$37K
Generic Drug Cost
$15K

Patient Demographics

Average Patient Age
75.8 years
Avg HCC Risk Score
0.95
Gender Split
65% female / 35% male

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Latanoprost
205
Tobramycin-Dexamethasone
Tobramycin/Dexamethasone
139
Timolol Maleate
57
Dorzolamide-Timolol
Dorzolamide Hcl/Timolol Maleat
41
Prednisolone Acetate
20
Brimonidine Tartrate
19

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

Optometrist Overview

How ALFONSO SITENGA, OD fits within the Optometrist landscape nationally.

60,463
Optometrist Providers in US
56
States with Optometrist
257
Avg Claims per Provider

ALFONSO SITENGA, OD's 583 claims are above the specialty average of 257.

Nearby Optometrist Providers in Alaska

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

Compare Optometrist nationally: see state-by-state distribution →

Frequently Asked Questions

What is ALFONSO SITENGA, OD's specialty?
ALFONSO SITENGA, OD specializes in Optometrist and practices in KENAI, Alaska. Credentials: OD.
How much does ALFONSO SITENGA, OD prescribe under Medicare Part D?
In 2023, ALFONSO SITENGA, OD wrote 583 Medicare Part D claims totaling $52K in drug costs for 247 beneficiaries.
What is ALFONSO SITENGA, OD's Medicare quality score?
ALFONSO SITENGA, OD has a CMS MIPS Final Score of 91.3071/100 (Quality: 82.6142). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is ALFONSO SITENGA, OD located?
ALFONSO SITENGA, OD is located at 115 BIDARKA ST, KENAI, AK, 99611. Phone: (907) 335-3358.
What is ALFONSO SITENGA, OD's NPI number?
ALFONSO SITENGA, OD's National Provider Identifier (NPI) is 1609445451, issued on 06/24/2021.
Does ALFONSO SITENGA, OD prescribe more brand-name or generic drugs?
ALFONSO SITENGA, OD's prescribing is 33% brand-name and 67% generic drugs by claim count, with $37K in brand drug costs.
How many Optometrist providers are there in the US?
There are 60,463 Optometrist providers across 56 states in the US. The average Optometrist provider writes 257 Medicare Part D claims per year.
What drugs does ALFONSO SITENGA, OD prescribe most often?
Based on 2023 Medicare Part D data, ALFONSO SITENGA, OD's most frequently prescribed drugs include Latanoprost, Tobramycin-Dexamethasone, Timolol Maleate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ALFONSO SITENGA, OD accept Medicare?
ALFONSO SITENGA, OD appears in CMS Medicare data with 583 Part D claims and 247 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ALFONSO SITENGA, OD's credentials?
ALFONSO SITENGA, OD's NPI is 1609445451 with credentials OD. 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