2026 NPPES data Certified Registered Nurse Anesthetist NPI 1558797332 CRNA
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ALFRED MAINA, CRNA

Certified Registered Nurse Anesthetist in CRAIG, Colorado. 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
2K
Medicare Part D claims · 145 beneficiaries · Certified Registered Nurse Anesthetist avg: 282
Generic prescribing
81%
generic claims · 19% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$933.67
6 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

ALFRED MAINA, CRNA filed 1,814 Medicare Part D claims in 2023 as a Certified Registered Nurse Anesthetist in CRAIG, Colorado, prescribing 81% generic.

2K
Part D claims, 2023
81%
generic prescribing
$933.67
industry payments (Sunshine Act)

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.

ALFRED MAINA, CRNA's Medicare Part D volume vs every U.S. prescriber

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

1,814 Top 17% higher than 83% 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%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). This entry sits in this band. 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

What does the federal data show about ALFRED MAINA, CRNA?

Quality data not reported

NPI registry status

Active

Issued 09/24/2013

NPI 1558797332

Primary specialty

Certified Registered Nurse Anesthetist

High-volume

62,433 US NPIs in this specialty

Medicare Part D claims

1,814 543% vs specialty avg

2023 prescription claims

Specialty avg: 282

Specialty distribution in Colorado

How Certified Registered Nurse Anesthetist compares to other specialties among Colorado providers

Colorado providers

Certified Registered Nurse Anesthetist share within Colorado

1. Certified Registered Nurse Anesthetist42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Certified Registered Nurse Anesthetist share within Colorado

Specialty board-certification context

Estimated specialty board-certified rate — Certified Registered Nurse Anesthetist (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Certified Registered Nurse Anesthetist ABMS/AOA estimate

Est. board-certified rate (Certified Registered Nurse Anesthetist) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Certified Registered Nurse Anesthetist) — 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).

ALFRED MAINA, CRNA appears in the CMS NPPES registry as a Certified Registered Nurse Anesthetist provider holding CRNA credentials at 750 HOSPITAL LOOP, CRAIG, CO, 81625, with a listed phone of (970) 826-2400. NPI 1558797332 was issued on 09/24/2013. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what MAINA 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 1,814 prescription claims written by this provider, covering 145 Medicare beneficiaries and totaling roughly $298K in drug spend, split 19% brand-name and 81% generic by claim count, with an opioid prescribing rate of 59.6%. 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.

Certified Registered Nurse Anesthetist is a high-volume specialty nationwide, with 62,433 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

750 HOSPITAL LOOP
CRAIG, CO 81625

Provider Details

NPI 1558797332
Specialty Certified Registered Nurse Anesthetist
Credentials CRNA
Gender Male
NPI Issued 09/24/2013

Hospital and facility affiliations

Facilities where ALFRED MAINA, CRNA 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 MEMORIAL HOSPITAL
CRAIG, CO

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

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for ALFRED MAINA, CRNA. Source: openpaymentsdata.cms.gov.

Total received

$934

Largest payer

Pacira Pharmaceuticals Incorporated

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

Brand vs generic prescribing mix · Typical

ALFRED MAINA, CRNA — brand share 19.0%
Specialty average (est.)

19% brand-name claims vs 81% generic, on 1,814 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.

1,814
Total Claims
$298K
Total Drug Cost
145
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,888
Total Day Supply
54,321
Brand vs Generic
19% brand / 81% generic
Brand Drug Cost
$233K
Generic Drug Cost
$65K
Opioid Claims
1,081 (59.6% rate)

Patient Demographics

Average Patient Age
62.7 years
Avg HCC Risk Score
2.12
Gender Split
68% female / 32% male
Age Distribution
<65: 75, 65-74: 50, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

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

What ALFRED MAINA, CRNA 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
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
200
Oxycodone-Acetaminophen
Oxycodone Hcl/Acetaminophen
197
Oxycodone Hcl
121
Pregabalin
105
Belbuca
Buprenorphine Hcl
99
Morphine Sulfate Er
Morphine Sulfate
97
Gabapentin
71
Cyclobenzaprine Hcl
66
Tramadol Hcl
60
Morphine Sulfate
58

* 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 ALFRED MAINA, CRNA fits within the Certified Registered Nurse Anesthetist landscape nationally.

62,433
Certified Registered Nurse Anesthetist Providers in US
55
States with Certified Registered Nurse Anesthetist
282
Avg Claims per Provider

ALFRED MAINA, CRNA's 1,814 claims are above the specialty average of 282.

Nearby Certified Registered Nurse Anesthetist Providers in Colorado

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

Compare Certified Registered Nurse Anesthetist nationally: see state-by-state distribution →

Frequently Asked Questions

What is ALFRED MAINA, CRNA's specialty?
ALFRED MAINA, CRNA specializes in Certified Registered Nurse Anesthetist and practices in CRAIG, Colorado. Credentials: CRNA.
How much does ALFRED MAINA, CRNA prescribe under Medicare Part D?
In 2023, ALFRED MAINA, CRNA wrote 1,814 Medicare Part D claims totaling $298K in drug costs for 145 beneficiaries.
Where is ALFRED MAINA, CRNA located?
ALFRED MAINA, CRNA is located at 750 HOSPITAL LOOP, CRAIG, CO, 81625. Phone: (970) 826-2400.
What is ALFRED MAINA, CRNA's NPI number?
ALFRED MAINA, CRNA's National Provider Identifier (NPI) is 1558797332, issued on 09/24/2013.
Does ALFRED MAINA, CRNA prescribe more brand-name or generic drugs?
ALFRED MAINA, CRNA's prescribing is 19% brand-name and 81% generic drugs by claim count, with $233K in brand drug costs.
Does ALFRED MAINA, CRNA prescribe opioids?
Yes, ALFRED MAINA, CRNA had 1,081 opioid claims in 2023 with an opioid prescribing rate of 59.6%.
How many Certified Registered Nurse Anesthetist providers are there in the US?
There are 62,433 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 ALFRED MAINA, CRNA prescribe most often?
Based on 2023 Medicare Part D data, ALFRED MAINA, CRNA's most frequently prescribed drugs include Hydrocodone-Acetaminophen, Oxycodone-Acetaminophen, Oxycodone Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ALFRED MAINA, CRNA accept Medicare?
ALFRED MAINA, CRNA appears in CMS Medicare data with 1,814 Part D claims and 145 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ALFRED MAINA, CRNA's credentials?
ALFRED MAINA, CRNA's NPI is 1558797332 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

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