NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1891774550 DO
Verify on CMS → Timothy Colby, DO
Family Medicine Physician in Ankeny, Iowa.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 147,760 in Family Medicine Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
721
Medicare Part D claims · 377 beneficiaries · Family Medicine Physician avg: 3K
Compiled from official public sources by the PlainDoctor editorial team.
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
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 reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
721 79% vs specialty avg
Specialty distribution in Iowa
How Family Medicine Physician compares to other specialties among Iowa providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Family Medicine Physician. Verify directly:
How MIPS and board certification work
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.
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.
Family Medicine Physician is a high-volume specialty nationwide, with 147,760 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
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
- Prednisone
Prednisone
211 claims
- Doxycycline Monohy…
Doxycycline Monohydrate
108 claims
- Fluconazole 72
Fluconazole
72 claims
- Sulfamethoxazole-T… 39
Sulfamethoxazole-Trimethoprim
39 claims
- Cephalexin 34
Cephalexin
34 claims
- Diclofenac Sodium 30
Diclofenac Sodium
30 claims
- Ciprofloxacin Hcl 26
Ciprofloxacin Hcl
26 claims
- Amoxicillin-Clavul… 23
Amoxicillin-Clavulanate Potass
23 claims
| 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.
147,760
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.
Dr. Jennifer Aanestad
M.D.
Durant, IA
Dr. Amjad Abdelhady
MD
Sioux City, IA
Dr. Afsana Abdullah
D.O.
Bettendorf, IA
Dr. Raja Ali Abdullah
MD
Cedar Falls, IA
Dr. Laura Abels
DO
Ankeny, IA
Compare Family Medicine Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Iowa medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Family Medicine Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
Healthcare Guides
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Medical Specialties Explained
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Understanding Medicare Claims Data
What prescribing data reveals about a provider
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How insurance networks affect your costs
Telehealth Guide
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Explore Iowa
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 147,760 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
View source datasets and methodology notes
- 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
Compiled from official public sources by the PlainDoctor editorial team.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.