2026 NPPES data Optometrist NPI 1891859682 O.D.
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JAMES CLARK, O.D.

Optometrist in GRIFFIN, Georgia. 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
645
Medicare Part D claims · 200 beneficiaries · Optometrist avg: 257
Generic prescribing
68%
generic claims · 32% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: JAMES CLARK, O.D. is a Optometrist ([object Object]) practicing in GRIFFIN, Georgia with a Medicare Part D prescribing footprint of 645 claims across 200 beneficiaries — 32% brand-name prescribing .

What the federal data shows

JAMES CLARK, O.D. filed 645 Medicare Part D claims in 2023 as a Optometrist in GRIFFIN, Georgia, prescribing 68% generic.

645
Part D claims, 2023
68%
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.

JAMES CLARK, O.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 12/19/2006

NPI 1891859682

Primary specialty

Optometrist

High-volume

60,463 US NPIs in this specialty

Medicare Part D claims

645 151% vs specialty avg

2023 prescription claims

Specialty avg: 257

Specialty distribution in Georgia

How Optometrist compares to other specialties among Georgia providers

Georgia providers

Optometrist share within Georgia

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

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).

JAMES CLARK, O.D. is a Optometrist provider practicing in GRIFFIN, Georgia, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: O.D.. NPI: 1891859682. 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.

JAMES CLARK, O.D. appears in the CMS NPPES registry as a Optometrist provider holding O.D. credentials at 210 S 16TH ST, GRIFFIN, GA, 30224, with a listed phone of (770) 229-8700. NPI 1891859682 was issued on 12/19/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CLARK 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 645 prescription claims written by this provider, covering 200 Medicare beneficiaries and totaling roughly $93K in drug spend, split 32% brand-name and 68% 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

210 S 16TH ST
GRIFFIN, GA 30224

Provider Details

NPI 1891859682
Specialty Optometrist
Credentials O.D.
Gender Male
NPI Issued 12/19/2006

Brand vs generic prescribing mix · Above average

JAMES CLARK, O.D. — brand share 32.0%
Specialty average (est.)

32% brand-name claims vs 68% generic, on 645 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.

645
Total Claims
$93K
Total Drug Cost
200
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
900
Total Day Supply
23,691
Brand vs Generic
32% brand / 68% generic
Brand Drug Cost
$77K
Generic Drug Cost
$16K
Antibiotic Claims
24

Patient Demographics

Average Patient Age
70.7 years
Avg HCC Risk Score
1.39
Gender Split
65% female / 35% male
Age Distribution
<65: 41, 65-74: 92, 75-84: 53, 85+: 14

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
206
Neomycin-Polymyxin-Dexameth
Neomycin/Polymyxin B/Dexametha
71
Restasis
Cyclosporine
56
Brimonidine Tartrate
49
Dorzolamide-Timolol
Dorzolamide Hcl/Timolol Maleat
31
Dorzolamide Hcl
25
Prednisolone Acetate
22
Timolol Maleate
20
Cyclosporine
17
Lumigan
Bimatoprost
16

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

Optometrist Overview

How JAMES CLARK, O.D. fits within the Optometrist landscape nationally.

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

JAMES CLARK, O.D.'s 645 claims are above the specialty average of 257.

Nearby Optometrist Providers in Georgia

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

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

Frequently Asked Questions

What is JAMES CLARK, O.D.'s specialty?
JAMES CLARK, O.D. specializes in Optometrist and practices in GRIFFIN, Georgia. Credentials: O.D..
How much does JAMES CLARK, O.D. prescribe under Medicare Part D?
In 2023, JAMES CLARK, O.D. wrote 645 Medicare Part D claims totaling $93K in drug costs for 200 beneficiaries.
Where is JAMES CLARK, O.D. located?
JAMES CLARK, O.D. is located at 210 S 16TH ST, GRIFFIN, GA, 30224. Phone: (770) 229-8700.
What is JAMES CLARK, O.D.'s NPI number?
JAMES CLARK, O.D.'s National Provider Identifier (NPI) is 1891859682, issued on 12/19/2006.
Does JAMES CLARK, O.D. prescribe more brand-name or generic drugs?
JAMES CLARK, O.D.'s prescribing is 32% brand-name and 68% generic drugs by claim count, with $77K 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 JAMES CLARK, O.D. prescribe most often?
Based on 2023 Medicare Part D data, JAMES CLARK, O.D.'s most frequently prescribed drugs include Latanoprost, Neomycin-Polymyxin-Dexameth, Restasis. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JAMES CLARK, O.D. accept Medicare?
JAMES CLARK, O.D. appears in CMS Medicare data with 645 Part D claims and 200 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JAMES CLARK, O.D.'s credentials?
JAMES CLARK, O.D.'s NPI is 1891859682 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