2026 NPPES data Optometrist NPI 1306991997 O.D.
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THOMAS CHAMBERS, O.D.

Optometrist in TIFFIN, Ohio. 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
439
Medicare Part D claims · 76 beneficiaries · Optometrist avg: 257
Generic prescribing
86%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: THOMAS CHAMBERS, O.D. is a Optometrist ([object Object]) practicing in TIFFIN, Ohio with a Medicare Part D prescribing footprint of 439 claims across 76 beneficiaries — 14% brand-name prescribing .

What stands out: THOMAS CHAMBERS, O.D. filed 439 Medicare Part D claims in 2023 across TIFFIN, Ohio. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

THOMAS CHAMBERS, O.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 01/24/2007

NPI 1306991997

Primary specialty

Optometrist

High-volume

60,463 US NPIs in this specialty

Medicare Part D claims

439 71% vs specialty avg

2023 prescription claims

Specialty avg: 257

Specialty distribution in Ohio

How Optometrist compares to other specialties among Ohio providers

Ohio providers

Optometrist share within Ohio

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

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).

THOMAS CHAMBERS, O.D. is a Optometrist provider practicing in TIFFIN, Ohio, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: O.D.. NPI: 1306991997. 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.

THOMAS CHAMBERS, O.D. appears in the CMS NPPES registry as a Optometrist provider holding O.D. credentials at 2845 S STATE ROUTE 100, TIFFIN, OH, 44883, with a listed phone of (419) 447-2143. NPI 1306991997 was issued on 01/24/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CHAMBERS 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 439 prescription claims written by this provider, covering 76 Medicare beneficiaries and totaling roughly $19K in drug spend, split 14% brand-name and 86% 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

2845 S STATE ROUTE 100
TIFFIN, OH 44883

Provider Details

NPI 1306991997
Specialty Optometrist
Credentials O.D.
Gender Male
NPI Issued 01/24/2007

Hospital and facility affiliations

Facilities where THOMAS CHAMBERS, 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.

FINDLAY OPTOMETRY CLINIC INC
FINDLAY, OH

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 — Ohio OMB 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 ~48K Ohio medical licensees in 2023 — they are NOT specific to THOMAS CHAMBERS, O.D.. To verify THOMAS CHAMBERS, O.D.'s current license status, search the OMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

158
Total board actions, Ohio 2023
Across 154 cases
3.29
Actions per 1,000 licensees
Ohio statewide rate
probation
Most common action type
56 cases

OMB 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 Ohio disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Typical

THOMAS CHAMBERS, O.D. — brand share 14.0%
Specialty average (est.)

14% brand-name claims vs 86% generic, on 439 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.

439
Total Claims
$19K
Total Drug Cost
76
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
602
Total Day Supply
16,022
Brand vs Generic
14% brand / 86% generic
Brand Drug Cost
$13K
Generic Drug Cost
$6K

Patient Demographics

Average Patient Age
76.8 years
Avg HCC Risk Score
1.00
Gender Split
55% female / 45% 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
273
Timolol Maleate
83
Brimonidine Tartrate
14
Dorzolamide-Timolol
Dorzolamide Hcl/Timolol Maleat
12

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

Optometrist Overview

How THOMAS CHAMBERS, O.D. fits within the Optometrist landscape nationally.

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

THOMAS CHAMBERS, O.D.'s 439 claims are above the specialty average of 257.

Nearby Optometrist Providers in Ohio

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

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

Frequently Asked Questions

What is THOMAS CHAMBERS, O.D.'s specialty?
THOMAS CHAMBERS, O.D. specializes in Optometrist and practices in TIFFIN, Ohio. Credentials: O.D..
How much does THOMAS CHAMBERS, O.D. prescribe under Medicare Part D?
In 2023, THOMAS CHAMBERS, O.D. wrote 439 Medicare Part D claims totaling $19K in drug costs for 76 beneficiaries.
Where is THOMAS CHAMBERS, O.D. located?
THOMAS CHAMBERS, O.D. is located at 2845 S STATE ROUTE 100, TIFFIN, OH, 44883. Phone: (419) 447-2143.
What is THOMAS CHAMBERS, O.D.'s NPI number?
THOMAS CHAMBERS, O.D.'s National Provider Identifier (NPI) is 1306991997, issued on 01/24/2007.
Does THOMAS CHAMBERS, O.D. prescribe more brand-name or generic drugs?
THOMAS CHAMBERS, O.D.'s prescribing is 14% brand-name and 86% generic drugs by claim count, with $13K 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 THOMAS CHAMBERS, O.D. prescribe most often?
Based on 2023 Medicare Part D data, THOMAS CHAMBERS, O.D.'s most frequently prescribed drugs include Latanoprost, Timolol Maleate, Brimonidine Tartrate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does THOMAS CHAMBERS, O.D. accept Medicare?
THOMAS CHAMBERS, O.D. appears in CMS Medicare data with 439 Part D claims and 76 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify THOMAS CHAMBERS, O.D.'s credentials?
THOMAS CHAMBERS, O.D.'s NPI is 1306991997 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