2026 NPPES data Optometrist NPI 1639141930 O.D., P.A.
Verify on CMS →

WILLIAM SPEARMAN, O.D., P.A.

Optometrist in PICKENS, South Carolina. 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
138
Medicare Part D claims · 34 beneficiaries · Optometrist avg: 257
Generic prescribing
75%
generic claims · 25% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

WILLIAM SPEARMAN, O.D., P.A. filed 138 Medicare Part D claims in 2023 as a Optometrist in PICKENS, South Carolina, prescribing 75% generic.

138
Part D claims, 2023
75%
generic prescribing

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.

WILLIAM SPEARMAN, O.D., P.A.'s Medicare Part D volume vs every U.S. prescriber

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

138 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 WILLIAM SPEARMAN, O.D., P.A.?

Quality data not reported

NPI registry status

Active

Issued 02/02/2006

NPI 1639141930

Primary specialty

Optometrist

High-volume

60,463 US NPIs in this specialty

Medicare Part D claims

138 46% vs specialty avg

2023 prescription claims

Specialty avg: 257

Specialty distribution in South Carolina

How Optometrist compares to other specialties among South Carolina providers

South Carolina providers

Optometrist share within South Carolina

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

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).

WILLIAM SPEARMAN, O.D., P.A. appears in the CMS NPPES registry as a Optometrist provider holding O.D., P.A. credentials at 306 E MAIN ST, PICKENS, SC, 29671, with a listed phone of (864) 878-6060. NPI 1639141930 was issued on 02/02/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what SPEARMAN 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 138 prescription claims written by this provider, covering 34 Medicare beneficiaries and totaling roughly $19K in drug spend, split 25% brand-name and 75% 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

306 E MAIN ST
PICKENS, SC 29671

Provider Details

NPI 1639141930
Specialty Optometrist
Credentials O.D., P.A.
Gender Male
NPI Issued 02/02/2006

Brand vs generic prescribing mix · Above average

WILLIAM SPEARMAN, O.D., P.A. — brand share 25.0%
Specialty average (est.)

25% brand-name claims vs 75% generic, on 138 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.

138
Total Claims
$19K
Total Drug Cost
34
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
242
Total Day Supply
6,768
Brand vs Generic
25% brand / 75% generic
Brand Drug Cost
$16K
Generic Drug Cost
$3K

Patient Demographics

Average Patient Age
73.3 years
Avg HCC Risk Score
1.03
Gender Split
47% female / 53% 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
74
Lumigan
Bimatoprost
15

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

Optometrist Overview

How WILLIAM SPEARMAN, O.D., P.A. fits within the Optometrist landscape nationally.

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

WILLIAM SPEARMAN, O.D., P.A.'s 138 claims are below the specialty average of 257.

Nearby Optometrist Providers in South Carolina

Other clinicians with the same primary specialty enrolled in South Carolina, drawn from the same CMS NPPES roster as SPEARMAN.

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

Frequently Asked Questions

What is WILLIAM SPEARMAN, O.D., P.A.'s specialty?
WILLIAM SPEARMAN, O.D., P.A. specializes in Optometrist and practices in PICKENS, South Carolina. Credentials: O.D., P.A..
How much does WILLIAM SPEARMAN, O.D., P.A. prescribe under Medicare Part D?
In 2023, WILLIAM SPEARMAN, O.D., P.A. wrote 138 Medicare Part D claims totaling $19K in drug costs for 34 beneficiaries.
Where is WILLIAM SPEARMAN, O.D., P.A. located?
WILLIAM SPEARMAN, O.D., P.A. is located at 306 E MAIN ST, PICKENS, SC, 29671. Phone: (864) 878-6060.
What is WILLIAM SPEARMAN, O.D., P.A.'s NPI number?
WILLIAM SPEARMAN, O.D., P.A.'s National Provider Identifier (NPI) is 1639141930, issued on 02/02/2006.
Does WILLIAM SPEARMAN, O.D., P.A. prescribe more brand-name or generic drugs?
WILLIAM SPEARMAN, O.D., P.A.'s prescribing is 25% brand-name and 75% generic drugs by claim count, with $16K 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 WILLIAM SPEARMAN, O.D., P.A. prescribe most often?
Based on 2023 Medicare Part D data, WILLIAM SPEARMAN, O.D., P.A.'s most frequently prescribed drugs include Latanoprost, Lumigan. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does WILLIAM SPEARMAN, O.D., P.A. accept Medicare?
WILLIAM SPEARMAN, O.D., P.A. appears in CMS Medicare data with 138 Part D claims and 34 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify WILLIAM SPEARMAN, O.D., P.A.'s credentials?
WILLIAM SPEARMAN, O.D., P.A.'s NPI is 1639141930 with credentials O.D., P.A.. 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