Dr. Krista N. Greenan, MD

  • Colorado Springs, CO
  • Neurosurgeon
NPI1801026992PAC ID6507053543
Medicare services, 2024
68
Medicare patients, 2024
110
Part D claims, 2024
38
Publications
3
Clinical trials
2
Practice address
1400 E Boulder St, Colorado Springs, CO 80909
Practice phone
Call (719) 365-5000
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

UCHealth Memorial Hospital Central

Hospital · Colorado Springs, Colorado

See all 4 affiliations

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Dr. Krista N. Greenan is a neurosurgeon in Colorado Springs, Colorado

Dr. Greenan practices at UCHealth Memorial Hospital Central in Colorado Springs, Colorado, part of UCHealth.

Dr. Greenan's NPI, 1801026992, was assigned on July 23, 2009. Dr. Greenan graduated from UC Davis School of Medicine in 2009. Dr. Greenan holds Colorado license DR.0061162.

NPI and contact details
Medicare PAC ID
6507053543
NPI enumeration date
July 23, 2009
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(719) 365-5000
Professional email
Get email
Personal email
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Mobile number
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Sex
Female
Estimated age
43
Medical school graduation
2009

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Krista N. Greenan practices at UCHealth Memorial Hospital Central in Colorado Springs, Colorado

Dr. Greenan's primary practice is UCHealth Memorial Hospital Central, at 1400 E Boulder St, Colorado Springs, CO 80909 in El Paso County. The practice phone is (719) 365-5000.

Source: Dmand AI Affiliation Data

Dr. Krista N. Greenan is affiliated with 3 sites of care and 1 medical group

Dr. Greenan's primary practice is UCHealth Memorial Hospital Central in Colorado Springs, Colorado, part of UCHealth. Dr. Greenan is also affiliated with UCHealth Parkview Medical Center. The medical group on file is UCHealth Medical Group. Dmand AI also links Dr. Greenan to 1 more group practice or clinic, named with a free account.

See all 4 affiliations for Dr. Greenan

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Krista N. Greenan's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Greenan practices, 3 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
UCHealth Memorial Hospital CentralAvailable with a free account
+2 more affiliated sitesAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Krista N. Greenan is one of 143 neurosurgeons in Colorado

Neurological surgery is Dr. Greenan's primary specialty in the NPI Registry, under taxonomy code 207T00000X. Dr. Greenan is board certified in neurological surgery by the American Board of Neurological Surgery. Dmand AI has Dr. Greenan's licenses on file in 2 states: Colorado and California.

Specialties and state licenses

  • Neurological surgery, ColoradoPrimaryLicense DR.0061162 · 2018 to 2027 · taxonomy 207T00000X
  • California licenseLicense A113957 · 2010 to 2021

Clinical focus

Dmand AI lists back and neck pain treatment without fusion, craniotomy, lower back pain, spinal fusion and thoracic spine disorders among the conditions Dr. Greenan treats.

Neurosurgeons near Dr. Greenan

Counts of neurosurgeons with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Dr. Krista N. Greenan billed Medicare for 68 services in 2024

CMS data shows 68 Medicare services from Dr. Greenan across 4 procedure codes in 2024, all of them office visits, for 110 Medicare patients. Medicare paid $7,220 for them. Every service was in an office.

Medicare services, 202468
Medicare patients110
Paid by Medicare$7,220
Procedure codes4

Dr. Greenan's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 652024: 685%

Dr. Greenan compared with the Colorado median for neurosurgeons, 2024

  • Dr. Greenan
  • Colorado median
Medicare services
68vs 13951% below
Medicare patients
110vs 113Close to median
Part D claims
17vs 2429% below

Medians across 126 neurosurgeons in Colorado with Dmand AI profiles that report each measure.

Dr. Greenan's most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Krista N. Greenan treated 110 Medicare patients in 2024, average age 71

CMS counts 110 Medicare patients who saw Dr. Greenan in 2024. The largest group is 75 to 84, with 41 patients. 72% of them have high blood pressure, and 65% have high cholesterol. 19% are also on Medicaid. Their average risk score is 1.46, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Greenan's median patient age at 71, with 51% women.

Medicare patients, 2024110
Average age71
Average risk score1.46
Also on Medicaid19%

Dr. Greenan's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Dr. Greenan's Medicare patients by sex, 2024

  • Women5146%
  • Men5954%

Chronic conditions among Dr. Greenan's Medicare patients, 2024

  1. High blood pressure72%
  2. High cholesterol65%
  3. Arthritis50%
  4. Mood disorders38%
  5. Anxiety36%
  6. Diabetes36%
  7. Depression33%
  8. Ischemic heart disease33%

Share of Medicare patients with each condition. A patient can have several.

Dr. Greenan's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 71

Patient panel by sex, all payers

  • Women51%
  • Men49%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Krista N. Greenan wrote 38 Medicare Part D claims in 2024

In 2024, Dr. Greenan wrote 38 Medicare Part D claims for 25 patients. 100% of them were for generic drugs. CMS names the drug for 17 of them, across 1 drug with 11 or more claims each, at $206 in total drug cost. In 2021, CMS named 12 claims across 1 drug.

Part D claims, 202438
Drugs named by CMS1
Total drug cost$206
Part D patients25

Dr. Greenan's most prescribed drugs by claims, 2023

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Part D claims for drugs CMS names, 2021 to 2023

  • 2021
  • 2023
Claims for drugs CMS names
2021: 122023: 1742%

Drugs named by CMS: 1 in 2023, 1 in 2021.

See all prescribing by Dr. Greenan

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

Dr. Krista N. Greenan ranks in the 55th percentile for spinal fusion in Medicare

Dr. Greenan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Greenan as offering telehealth. CMS counts 49 procedures of spinal fusion by Dr. Greenan, more than 55% of the clinicians it reports for that procedure.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Where Dr. Greenan ranks in Medicare procedure volume

Spinal fusion
55th percentile49 procedures
Laminectomy or laminotomy (partial removal of spine bones)
43rd percentile16 procedures

CMS ranks each clinician against every clinician it reports for the same procedure category.

Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)

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Dr. Krista N. Greenan has 3 publications on record

Dmand AI links 3 papers to Dr. Greenan, published from 2017 to 2020. Dr. Greenan has published most often in J Neurosurg Pediatr. Dr. Greenan's most frequent co-authors are Marike Zwienenberg, MD, Jared D. Ament, MD, MPH and Jennifer L. Armstrong, MD.

Papers3
Years published2017 to 2020

Dr. Greenan's papers by year, 2017 to 2020

Dr. Greenan's most frequent co-authors

Recent publications by Dr. Greenan

See all 3 publications and co-authors

See who Dr. Greenan researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Greenan works with, so you can find a warm path to the right neurosurgeons.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. Krista N. Greenan has worked on 2 clinical trials

Dmand AI links Dr. Greenan to 2 clinical trials, 2 of them phase 2 studies. Conditions studied include Brain Injuries and Craniocerebral Trauma. Neuren Pharmaceuticals Limited sponsors the most, 2.

Conditions in Dr. Greenan's trials

  • Brain Injuries
  • Craniocerebral Trauma

Investigators on the most trials with Dr. Greenan

Recent clinical trials with Dr. Greenan

Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)

Dr. Krista N. Greenan received $1,470 in industry payments from 2017 to 2023

CMS Open Payments shows 21 general payments to Dr. Greenan from 8 drug and device companies from 2017 to 2023. Travel and lodging make up the largest share, 48% of the total. Globus Medical, Inc. paid the most, $706.

General payments to Dr. Greenan by program year, 2017 to 2023

General payments to Dr. Greenan by kind, 2017 to 2023

$1.5Kin total
  • Travel and lodging$70648%
  • Food and beverage$59641%
  • Education$16811%

Companies that paid Dr. Greenan the most, 2017 to 2023

Share is of all general payments to this clinician.

See all payments to Dr. Greenan

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Krista N. Greenan has 4 awards and honors on record

Dmand AI lists 4 awards for Dr. Greenan, most recently Nursing Staff Award in 2012.

Awards and honors for Dr. Greenan

  1. 2012
    • Nursing Staff Award
  2. 2006
    • Pre-doctoral Research Fellowship
  3. 2003
    • Alpha Epsilon Delta Honors Society
  4. 2001
    • Helen A. Gaag Memorial Scholarship

Source: Dmand AI Professional Profile Data

Dr. Krista N. Greenan graduated from UC Davis School of Medicine

Dr. Greenan graduated from UC Davis School of Medicine in 2009. Dr. Greenan is a member of CNS.

  1. Medical schoolUC Davis School of Medicine
  2. Board certified in neurological surgeryAmerican Board of Neurological Surgery

Source: Dmand AI Professional Profile Data

Dr. Krista N. Greenan accepts plans from 16 insurance carriers

Dr. Greenan is in network with 16 carriers, including Aetna, Elevance and United Healthcare. PPO plans come from the most carriers, 11. Check the plan with the practice before a visit.

Plan types Dr. Greenan accepts, by number of carriers

  1. PPO11
  2. Medicare10
  3. HMO9
  4. POS7
  5. EPO4
  6. Medicaid2

Source: Dmand AI Insurance Network Data

Sources for Dr. Krista N. Greenan's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Clinical trials and co-investigatorsDmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Awards and committee rolesDmand AI Professional Profile Data
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Krista N. Greenan

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Dr. Krista N. Greenan's NPI number?

Dr. Krista N. Greenan's NPI number is 1801026992. It was assigned on July 23, 2009, and it is active in the NPI Registry.

What kind of doctor is Dr. Krista N. Greenan?

Dr. Krista N. Greenan is a neurosurgeon in Colorado Springs, Colorado. The primary specialty in the NPI Registry is Neurological Surgery Physician (taxonomy code 207T00000X).

Where does Dr. Krista N. Greenan practice?

Dr. Greenan practices at 1400 E Boulder St, Colorado Springs, CO 80909. Dr. Greenan's primary practice is UCHealth Memorial Hospital Central in Colorado Springs, Colorado, part of UCHealth. Dmand AI also links Dr. Greenan to 1 group practice or clinic.

What is Dr. Krista N. Greenan's office phone number?

The practice phone on file for Dr. Greenan is (719) 365-5000.

What is Dr. Krista N. Greenan's medical license number?

Dr. Greenan holds Colorado license DR.0061162, one of the licenses on file in 2 states.

Which states has Dr. Krista N. Greenan been licensed in?

Dmand AI has state licenses on file for Dr. Greenan in Colorado (2018 to 2027) and California (2010 to 2021).

Which hospitals is Dr. Krista N. Greenan affiliated with?

Dr. Greenan practices at UCHealth Memorial Hospital Central in Colorado Springs, Colorado. Dr. Greenan is also affiliated with UCHealth Parkview Medical Center.

What medical group is Dr. Krista N. Greenan part of?

Dr. Greenan is linked to UCHealth Medical Group.

Does Dr. Krista N. Greenan accept Medicare?

Yes. CMS data shows Dr. Greenan billed Medicare for 68 services in 2024, and Dr. Greenan accepts Medicare assignment.

Does Dr. Krista N. Greenan offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Dr. Greenan as offering telehealth services.

Show 10 more questionsShow fewer questions

How many Medicare patients does Dr. Krista N. Greenan see?

CMS counts 110 Medicare patients who saw Dr. Greenan in 2024, with an average age of 71.

Is Dr. Krista N. Greenan board certified?

Yes. Dr. Greenan is board certified in neurological surgery by the American Board of Neurological Surgery.

What services does Dr. Krista N. Greenan bill to Medicare?

In 2024, Dr. Greenan's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99215) and office visit, new patient (99204).

Where did Dr. Krista N. Greenan go to medical school?

Dr. Greenan graduated from UC Davis School of Medicine in 2009.

What drugs does Dr. Krista N. Greenan prescribe most?

In 2023 Medicare Part D data, Dr. Greenan's most prescribed drugs by claims were Gabapentin.

Has Dr. Krista N. Greenan received payments from drug or device companies?

CMS Open Payments shows $1,470 in general payments to Dr. Greenan from 8 companies from 2017 to 2023. The largest total came from Globus Medical, Inc.

How long has Dr. Krista N. Greenan been practicing?

Dr. Greenan graduated from medical school in 2009, 17 years ago.

Does Dr. Krista N. Greenan do research?

Dmand AI links 3 publications to Dr. Greenan, published from 2017 to 2020. Dr. Greenan has worked on 2 clinical trials.

Who does Dr. Krista N. Greenan publish with?

Dr. Greenan's most frequent co-authors are Marike Zwienenberg, MD (2 shared papers), Jared D. Ament, MD, MPH (1 shared paper) and Jennifer L. Armstrong, MD (1 shared paper).

What insurance does Dr. Krista N. Greenan accept?

Dr. Greenan is in network with 16 carriers, including Aetna, Elevance and United Healthcare. PPO plans come from the most carriers, 11. Check the plan with the practice before a visit.

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