NPI registry status
Active
2026 NPPES data Certified Registered Nurse Anesthetist NPI 1265641310 CRNA
Verify on CMS → Gregory Anderson, CRNA
Certified Registered Nurse Anesthetist in Creston, 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 62,644 in Certified Registered Nurse Anesthetist, 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
783
Medicare Part D claims · 127 beneficiaries · Certified Registered Nurse Anesthetist avg: 282
Generic prescribing
93%
generic claims · 7% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Gregory Anderson, CRNA filed 783 Medicare Part D claims in 2023 as a Certified Registered Nurse Anesthetist in Creston, Iowa, prescribing 93% generic.
- 783
- Part D claims, 2023
- 93%
- 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.
Gregory Anderson, CRNA's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
783 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
What does the federal data show about Gregory Anderson, CRNA?
Quality data not reportedPrimary specialty
Certified Registered Nurse Anesthetist
Medicare Part D claims
783 178% vs specialty avg
Specialty distribution in Iowa
How Certified Registered Nurse Anesthetist 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 Certified Registered Nurse Anesthetist. 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).
Gregory Anderson, CRNA appears in the CMS NPPES registry as a Certified Registered Nurse Anesthetist provider holding CRNA credentials at 1700 W TOWNLINE ST, Creston, IA, 50801, with a listed phone of (641) 782-7091. NPI 1265641310 was issued on 05/22/2007.
Medicare Part D records for calendar year 2023 show 783 prescription claims written by this provider, covering 127 Medicare beneficiaries and totaling roughly $59K in drug spend, split 7% brand-name and 93% generic by claim count, with an opioid prescribing rate of 38.4%.
Certified Registered Nurse Anesthetist is a high-volume specialty nationwide, with 62,644 enrolled providers across 55 states and an average of 282 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 | 1265641310 |
|---|---|
| Specialty | Certified Registered Nurse Anesthetist |
| Credentials | CRNA |
| Gender | Male |
| NPI Issued | 05/22/2007 |
Brand vs generic prescribing mix · Generic-heavy
Gregory Anderson, CRNA - brand share 7.0%
Certified Registered Nurse Anesthetist average
7% brand-name claims vs 93% generic, on 783 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.
783
Total Claims
$59K
Total Drug Cost
127
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 866
- Total Day Supply
- 21,905
- Brand vs Generic
- 7% brand / 93% generic
- Brand Drug Cost
- $41K
- Generic Drug Cost
- $18K
- Opioid Claims
- 301 (38.4% rate)
Patient Demographics
- Average Patient Age
- 69.6 years
- Avg HCC Risk Score
- 1.35
- Gender Split
- 60% female / 40% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Gregory Anderson, CRNA prescribes most
Top Medicare Part D drugs by claim count, 2023
- Gabapentin
Gabapentin
133 claims
- Tramadol Hcl
Tramadol Hcl
81 claims
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
79 claims
- Pregabalin
Pregabalin
78 claims
- Tizanidine Hcl 47
Tizanidine Hcl
47 claims
- Cyclobenzaprine Hcl 39
Cyclobenzaprine Hcl
39 claims
- Oxycodone Hcl 36
Oxycodone Hcl
36 claims
- Methadone Hcl 26
Methadone Hcl
26 claims
| Drug | Claims |
|---|---|
| Gabapentin | 133 |
| Tramadol Hcl | 81 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 79 |
| Pregabalin | 78 |
| Tizanidine Hcl | 47 |
| Cyclobenzaprine Hcl | 39 |
| Oxycodone Hcl | 36 |
| Methadone Hcl | 26 |
| Duloxetine Hcl | 22 |
| Meloxicam | 22 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Certified Registered Nurse Anesthetist Overview
How Gregory Anderson, CRNA fits within the Certified Registered Nurse Anesthetist landscape nationally.
62,644
Certified Registered Nurse Anesthetist Providers in US
55
States with Certified Registered Nurse Anesthetist
282
Avg Claims per Provider
Gregory Anderson, CRNA's 783 claims are above the specialty average of 282.
Nearby Certified Registered Nurse Anesthetist Providers in Iowa
Other clinicians with the same primary specialty enrolled in Iowa, drawn from the same CMS NPPES roster as Anderson.
Lydia Adams
Decorah, IA
Dr. Seth Additon
DNP, CRNA
Manchester, IA
Dr. John Aker
CRNA, MS
Iowa City, IA
Dr. Robert Albin
CRNA
Des Moines, IA
Dr. Carla Aldrich
CRNA
Clarion, IA
Compare Certified Registered Nurse Anesthetist 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 Certified Registered Nurse Anesthetist 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.
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Frequently Asked Questions
What is Gregory Anderson, CRNA's specialty? ▼
Gregory Anderson, CRNA specializes in Certified Registered Nurse Anesthetist and practices in Creston, Iowa. Credentials: CRNA.
How much does Gregory Anderson, CRNA prescribe under Medicare Part D? ▼
In 2023, Gregory Anderson, CRNA wrote 783 Medicare Part D claims totaling $59K in drug costs for 127 beneficiaries.
Where is Gregory Anderson, CRNA located? ▼
Gregory Anderson, CRNA is located at 1700 W TOWNLINE ST, Creston, IA, 50801. Phone: (641) 782-7091.
What is Gregory Anderson, CRNA's NPI number? ▼
Gregory Anderson, CRNA's National Provider Identifier (NPI) is 1265641310, issued on 05/22/2007.
Does Gregory Anderson, CRNA prescribe more brand-name or generic drugs? ▼
Gregory Anderson, CRNA's prescribing is 7% brand-name and 93% generic drugs by claim count, with $41K in brand drug costs.
Does Gregory Anderson, CRNA prescribe opioids? ▼
Yes, Gregory Anderson, CRNA had 301 opioid claims in 2023 with an opioid prescribing rate of 38.4%.
How many Certified Registered Nurse Anesthetist providers are there in the US? ▼
There are 62,644 Certified Registered Nurse Anesthetist providers across 55 states in the US. The average Certified Registered Nurse Anesthetist provider writes 282 Medicare Part D claims per year.
What drugs does Gregory Anderson, CRNA prescribe most often? ▼
Based on 2023 Medicare Part D data, Gregory Anderson, CRNA's most frequently prescribed drugs include Gabapentin, Tramadol Hcl, Hydrocodone-Acetaminophen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Gregory Anderson, CRNA accept Medicare? ▼
Gregory Anderson, CRNA appears in CMS Medicare data with 783 Part D claims and 127 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Gregory Anderson, CRNA's credentials? ▼
Gregory Anderson, CRNA's NPI is 1265641310 with credentials CRNA. 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.