2026 NPPES data Optometrist NPI 1871577528 O.D.
Verify on CMS →

SUSAN LITTLEFIELD, O.D.

Optometrist in FOREST GROVE, Oregon. 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
130
Medicare Part D claims · 16 beneficiaries · Optometrist avg: 257
Generic prescribing
56%
generic claims · 44% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$76.44
3 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

SUSAN LITTLEFIELD, O.D. filed 130 Medicare Part D claims in 2023 as a Optometrist in FOREST GROVE, Oregon, prescribing 56% generic.

130
Part D claims, 2023
56%
generic prescribing
$76.44
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.

SUSAN LITTLEFIELD, O.D.'s Medicare Part D volume vs every U.S. prescriber

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

130 35th percentile higher than 35% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 400–600: 90,619 prescribers (7%). Above this entry. 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

What does the federal data show about SUSAN LITTLEFIELD, O.D.?

Quality data not reported

NPI registry status

Active

Issued 12/05/2005

NPI 1871577528

Primary specialty

Optometrist

High-volume

60,463 US NPIs in this specialty

Medicare Part D claims

130 49% vs specialty avg

2023 prescription claims

Specialty avg: 257

Specialty distribution in Oregon

How Optometrist compares to other specialties among Oregon providers

Oregon providers

Optometrist share within Oregon

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

Specialty board-certification context

Estimated specialty board-certified rate — Optometrist (ABMS / AOA reference)

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

Est. board-certified rate (Optometrist) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Optometrist) — 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).

SUSAN LITTLEFIELD, O.D. appears in the CMS NPPES registry as a Optometrist provider holding O.D. credentials at 2043 COLLEGE WAY, FOREST GROVE, OR, 97116, with a listed phone of (503) 352-2172. NPI 1871577528 was issued on 12/05/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what LITTLEFIELD 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 130 prescription claims written by this provider, covering 16 Medicare beneficiaries and totaling roughly $4K in drug spend, split 44% brand-name and 56% 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.

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

2043 COLLEGE WAY
FOREST GROVE, OR 97116

Provider Details

NPI 1871577528
Specialty Optometrist
Credentials O.D.
Gender Female
NPI Issued 12/05/2005

Hospital and facility affiliations

Facilities where SUSAN LITTLEFIELD, O.D. 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.

PACIFIC UNIVERSITY
BEAVERTON, OR

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

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 SUSAN LITTLEFIELD, O.D.. Source: openpaymentsdata.cms.gov.

Total received

$76

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.

Brand vs generic prescribing mix · Above average

SUSAN LITTLEFIELD, O.D. — brand share 44.0%
Specialty average (est.)

44% brand-name claims vs 56% generic, on 130 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.

130
Total Claims
$4K
Total Drug Cost
16
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
155
Total Day Supply
3,898
Brand vs Generic
44% brand / 56% generic
Brand Drug Cost
$3K
Generic Drug Cost
$1K

Patient Demographics

Average Patient Age
73.2 years
Avg HCC Risk Score
0.95

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
74
Timolol Maleate
47

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

Optometrist Overview

How SUSAN LITTLEFIELD, O.D. fits within the Optometrist landscape nationally.

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

SUSAN LITTLEFIELD, O.D.'s 130 claims are below the specialty average of 257.

Nearby Optometrist Providers in Oregon

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

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

Frequently Asked Questions

What is SUSAN LITTLEFIELD, O.D.'s specialty?
SUSAN LITTLEFIELD, O.D. specializes in Optometrist and practices in FOREST GROVE, Oregon. Credentials: O.D..
How much does SUSAN LITTLEFIELD, O.D. prescribe under Medicare Part D?
In 2023, SUSAN LITTLEFIELD, O.D. wrote 130 Medicare Part D claims totaling $4K in drug costs for 16 beneficiaries.
Where is SUSAN LITTLEFIELD, O.D. located?
SUSAN LITTLEFIELD, O.D. is located at 2043 COLLEGE WAY, FOREST GROVE, OR, 97116. Phone: (503) 352-2172.
What is SUSAN LITTLEFIELD, O.D.'s NPI number?
SUSAN LITTLEFIELD, O.D.'s National Provider Identifier (NPI) is 1871577528, issued on 12/05/2005.
Does SUSAN LITTLEFIELD, O.D. prescribe more brand-name or generic drugs?
SUSAN LITTLEFIELD, O.D.'s prescribing is 44% brand-name and 56% generic drugs by claim count, with $3K 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 SUSAN LITTLEFIELD, O.D. prescribe most often?
Based on 2023 Medicare Part D data, SUSAN LITTLEFIELD, O.D.'s most frequently prescribed drugs include Latanoprost, Timolol Maleate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does SUSAN LITTLEFIELD, O.D. accept Medicare?
SUSAN LITTLEFIELD, O.D. appears in CMS Medicare data with 130 Part D claims and 16 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify SUSAN LITTLEFIELD, O.D.'s credentials?
SUSAN LITTLEFIELD, O.D.'s NPI is 1871577528 with credentials O.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