2026 NPPES data Family Medicine Physician NPI 1891774550 DO
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TIMOTHY COLBY, DO

Family Medicine Physician in ANKENY, Iowa. 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
721
Medicare Part D claims · 377 beneficiaries · Family Medicine Physician avg: 3K

What the federal data shows

TIMOTHY COLBY, DO filed 721 Medicare Part D claims in 2023 as a Family Medicine Physician in ANKENY, Iowa.

721
Part D claims, 2023
Likely
board-certified (heuristic)

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.

TIMOTHY COLBY, DO's Medicare Part D volume vs every U.S. prescriber

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

721 Top 29% higher than 71% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). This entry sits in this band. 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

Board certification likely (heuristic — not verified)

TIMOTHY COLBY, DO practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about TIMOTHY COLBY, DO?

Quality data not reported

NPI registry status

Active

Issued 01/11/2006

NPI 1891774550

Primary specialty

Family Medicine Physician

High-volume

147,640 US NPIs in this specialty

Medicare Part D claims

721 79% vs specialty avg

2023 prescription claims

Specialty avg: 3,418

Specialty distribution in Iowa

How Family Medicine Physician compares to other specialties among Iowa providers

Iowa providers

Family Medicine Physician share within Iowa

1. Family Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Family Medicine Physician share within Iowa

Specialty board-certification context

Estimated specialty board-certified rate — Family Medicine Physician (ABMS / AOA reference)

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

Est. board-certified rate (Family Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Family Medicine Physician) — 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).

TIMOTHY COLBY, DO appears in the CMS NPPES registry as a Family Medicine Physician provider holding DO credentials at 1410 SW TRADITION DR STE 110, ANKENY, IA, 50023, with a listed phone of (515) 875-9696. NPI 1891774550 was issued on 01/11/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what COLBY 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 721 prescription claims written by this provider, covering 377 Medicare beneficiaries and totaling roughly $12K in drug spend. 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.

Family Medicine Physician is a high-volume specialty nationwide, with 147,640 enrolled providers across 56 states and an average of 3,418 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

1410 SW TRADITION DR STE 110
ANKENY, IA 50023

Provider Details

NPI 1891774550
Specialty Family Medicine Physician
Credentials DO
Gender Male
NPI Issued 01/11/2006

Hospital and facility affiliations

Facilities where TIMOTHY COLBY, DO 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.

THE IOWA CLINIC PC
ANKENY, IA

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

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

721
Total Claims
$12K
Total Drug Cost
377
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
729
Total Day Supply
6,974
Generic Drug Cost
$7K
Antibiotic Claims
310

Patient Demographics

Average Patient Age
72.8 years
Avg HCC Risk Score
1.05
Gender Split
69% female / 31% male
Age Distribution
<65: 26, 65-74: 202, 75-84: 122, 85+: 27

Top Prescribed Drugs (Medicare Part D)

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

What TIMOTHY COLBY, DO prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Prednisone
211
Doxycycline Monohydrate
108
Fluconazole
72
Sulfamethoxazole-Trimethoprim
Sulfamethoxazole/Trimethoprim
39
Cephalexin
34
Diclofenac Sodium
30
Ciprofloxacin Hcl
26
Amoxicillin-Clavulanate Potass
Amoxicillin/Potassium Clav
23
Azithromycin
21
Cefdinir
21

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

Family Medicine Physician Overview

How TIMOTHY COLBY, DO fits within the Family Medicine Physician landscape nationally.

147,640
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider

TIMOTHY COLBY, DO's 721 claims are below the specialty average of 3,418.

Nearby Family Medicine Physician Providers in Iowa

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

Compare Family Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is TIMOTHY COLBY, DO's specialty?
TIMOTHY COLBY, DO specializes in Family Medicine Physician and practices in ANKENY, Iowa. Credentials: DO.
How much does TIMOTHY COLBY, DO prescribe under Medicare Part D?
In 2023, TIMOTHY COLBY, DO wrote 721 Medicare Part D claims totaling $12K in drug costs for 377 beneficiaries.
Where is TIMOTHY COLBY, DO located?
TIMOTHY COLBY, DO is located at 1410 SW TRADITION DR STE 110, ANKENY, IA, 50023. Phone: (515) 875-9696.
What is TIMOTHY COLBY, DO's NPI number?
TIMOTHY COLBY, DO's National Provider Identifier (NPI) is 1891774550, issued on 01/11/2006.
How many Family Medicine Physician providers are there in the US?
There are 147,640 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does TIMOTHY COLBY, DO prescribe most often?
Based on 2023 Medicare Part D data, TIMOTHY COLBY, DO's most frequently prescribed drugs include Prednisone, Doxycycline Monohydrate, Fluconazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does TIMOTHY COLBY, DO accept Medicare?
TIMOTHY COLBY, DO appears in CMS Medicare data with 721 Part D claims and 377 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify TIMOTHY COLBY, DO's credentials?
TIMOTHY COLBY, DO's NPI is 1891774550 with credentials DO. 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