2026 NPPES data Neurological Surgery Physician NPI 1164009221 MD
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Katherine Callahan, MD

Neurological Surgery Physician in Salt Lake City, Utah. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 8,100 in Neurological Surgery 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
62
Medicare Part D claims · 33 beneficiaries · Neurological Surgery Physician avg: 181
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Katherine Callahan, MD filed 62 Medicare Part D claims in 2023 as a Neurological Surgery Physician in Salt Lake City, Utah.

62
Part D claims, 2023

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.

Katherine Callahan, MD's Medicare Part D volume vs every U.S. prescriber

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

62 0th percentile higher than 0% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 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. 2K+: 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-eligible specialty (heuristic, not verified)

Katherine Callahan, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about Katherine Callahan, MD?

Quality data not reported

NPI registry status

Active

Issued 03/25/2021

NPI 1164009221

Primary specialty

Neurological Surgery Physician

Mid-sized

8,100 US NPIs in this specialty

Medicare Part D claims

62 66% vs specialty avg

2023 prescription claims

Specialty avg: 181

Specialty distribution in Utah

How Neurological Surgery Physician compares to other specialties among Utah providers

Utah providers

Largest specialties in Utah (% of in-state providers)

Behavior Technician - 12.4%Behavior Technician12.4%Clinical Social Worker - 6.3%Clinical Social Worker6.3%Community Health Worker - 6.1%Community Health Worker6.1%Case Manager/Care Coordinator - 5.9%Case Manager/Care Coordinator5.9%Counselor - 4.9%Counselor4.9%Student in an Organized Health Care Education/Training Program - 4.3%Student in an Organized Health Care Education/Training Program4.3%Neurological Surgery Physician - 0.1%Neurological Surgery Physician0.1%
Largest specialties in Utah (% of in-state 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 Neurological Surgery Physician. Verify directly:

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).

Katherine Callahan, MD appears in the CMS NPPES registry as a Neurological Surgery Physician provider holding MD credentials at 175 N MEDICAL DR RM 5323, Salt Lake City, UT, 84112, with a listed phone of (801) 581-2121. NPI 1164009221 was issued on 03/25/2021. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Callahan 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 62 prescription claims written by this provider, covering 33 Medicare beneficiaries and totaling roughly $944 in drug spend, with an opioid prescribing rate of 29.0%. 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.

Neurological Surgery Physician is a mid-sized specialty nationwide, with 8,100 enrolled providers across 53 states and an average of 181 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

175 N MEDICAL DR RM 5323
Salt Lake City, UT 84112

Provider Details

NPI 1164009221
Specialty Neurological Surgery Physician
Credentials MD
Gender Female
NPI Issued 03/25/2021

Medicare Part D Prescribing Data

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

62
Total Claims
$944
Total Drug Cost
33
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
64
Total Day Supply
863
Generic Drug Cost
$905
Opioid Claims
18 (29.0% rate)

Patient Demographics

Average Patient Age
68.9 years
Avg HCC Risk Score
1.06
Gender Split
39% female / 61% 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
Oxycodone Hcl
14
Methocarbamol
12

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

Neurological Surgery Physician Overview

How Katherine Callahan, MD fits within the Neurological Surgery Physician landscape nationally.

8,100
Neurological Surgery Physician Providers in US
53
States with Neurological Surgery Physician
181
Avg Claims per Provider

Katherine Callahan, MD's 62 claims are below the specialty average of 181.

Nearby Neurological Surgery Physician Providers in Utah

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

Compare Neurological Surgery 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 Utah medical board, federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Neurological Surgery 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.

Frequently Asked Questions

What is Katherine Callahan, MD's specialty?
Katherine Callahan, MD specializes in Neurological Surgery Physician and practices in Salt Lake City, Utah. Credentials: MD.
How much does Katherine Callahan, MD prescribe under Medicare Part D?
In 2023, Katherine Callahan, MD wrote 62 Medicare Part D claims totaling $944 in drug costs for 33 beneficiaries.
Where is Katherine Callahan, MD located?
Katherine Callahan, MD is located at 175 N MEDICAL DR RM 5323, Salt Lake City, UT, 84112. Phone: (801) 581-2121.
What is Katherine Callahan, MD's NPI number?
Katherine Callahan, MD's National Provider Identifier (NPI) is 1164009221, issued on 03/25/2021.
Does Katherine Callahan, MD prescribe opioids?
Yes, Katherine Callahan, MD had 18 opioid claims in 2023 with an opioid prescribing rate of 29.0%.
How many Neurological Surgery Physician providers are there in the US?
There are 8,100 Neurological Surgery Physician providers across 53 states in the US. The average Neurological Surgery Physician provider writes 181 Medicare Part D claims per year.
What drugs does Katherine Callahan, MD prescribe most often?
Based on 2023 Medicare Part D data, Katherine Callahan, MD's most frequently prescribed drugs include Oxycodone Hcl, Methocarbamol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Katherine Callahan, MD accept Medicare?
Katherine Callahan, MD appears in CMS Medicare data with 62 Part D claims and 33 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Katherine Callahan, MD's credentials?
Katherine Callahan, MD's NPI is 1164009221 with credentials MD. 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

Compiled from official public sources by the PlainDoctor editorial team.