DR. CHRISTINA VIOLA DARBY M.D.
NPI 1225348592
Psychiatry & Neurology - Sleep Medicine in Anchorage, AK

Q: What is Christina Darby's NPI number?

The NPI number for Christina Darby is 1225348592. It was assigned to this individual provider in the NPPES registry on October 20, 2010. The provider is also known as Dr. Christina Viola Anagick M.D..

Q: What is Christina Darby's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Sleep Medicine, with taxonomy code 2084S0012X.

Q: When was this NPI record last updated?

The NPPES record for Christina Darby was last updated on March 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since October 20, 2010PECOS EnrolledAccepts Medicare Assignment

87.09/100

CMS Quality Rating

3900 AMBASSADOR DR, ANCHORAGE, AK 99508(907) 563-2662 Get Directions Write a Review

NPPES record last updated: March 6, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 6, 2026, May 11, 2017, Aug 22, 2016 and 1 more (4 updates tracked since 2016).

On this page

About Dr. Christina Viola Darby M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. CHRISTINA VIOLA DARBY M.D. (NPI 1225348592) is an individual sleep medicine provider in Anchorage, Alaska, licensed in Alaska (108257) and active in the NPI registry since October 2010. She is enrolled in Medicare PECOS and is a graduate of University Of Washington School Of Medicine (2006).

NPPES Registry Identity

NPI1225348592

Entity TypeIndividualFemale

Primary Taxonomy2084S0012X

Provider Legal NameDR. CHRISTINA VIOLA DARBYCredential: M.D.

Location Address3900 AMBASSADOR DRAnchorage, AK 99508-5922

Mailing Address3900 Ambassador Drive, Alaska Native Medical Center Sleep Medicine ClinicAnchorage, AK 99508

Phone(907) 563-2662

Sole ProprietorNo

Medical School CMSUniversity Of Washington School Of MedicineGraduated 2006

Enumeration DateOctober 20, 2010

Last NPPES UpdateMarch 6, 20264 updates tracked since enumeration

NPPES CertifiedMarch 6, 2026

✔ NPI 1225348592 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychiatry & Neurology · Sleep MedicineAllopathic & Osteopathic Physicians

Taxonomy Code2084S0012X

Licenses✔ Licensed in AK · 108257✔ Licensed in WA · MD 60222547

Definition

A Psychiatrist or Neurologist who practices Sleep Medicine is certified in the subspecialty of sleep medicine and specializes in the clinical assessment, physiologic testing, diagnosis, management and prevention of sleep and circadian rhythm disorders. Sleep specialists treat patients of any age and use multidisciplinary approaches. Disorders managed by sleep specialists include, but are not limited to, sleep related breathing disorders, insomnia, hypersomnias, circadian rhythm sleep disorders, parasomnias and sleep related movement disorders.

Also ListedPsychiatry & Neurology · NeurologyTaxonomy 2084N0400X · License MD 60222547 (WA)

3900 AMBASSADOR DR, Anchorage, AK 99508

Open in Google Maps ↗

Other Names 1

Former Name (1)Dr. Christina Viola Anagick M.d.

Other Identifiers 3

MedicaidTEZM14RALAK

Medicaid1225348592WA

MedicaidMD9703WAK

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Moda Health Plan, Inc., Premera Blue Cross Blue Shield of Alaska.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Christina Viola Darby M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID941470710

PECOS Enrollment IDI20160513000010

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Christina Darby reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Alaska Native Tribal Health Consortium

0.2 mi

General Acute Care Hospital

4315 DIPLOMACY DR
Anchorage, AK 99508

Reassigned Medicare billing, Texas enrollment
1,373 clinicians in this Medicare group

NPI 1437189339 (907) 563-2662

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 11

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

61 services48 patients

Sleep study in sleep lab with continuous airway pressure (6 years or older) 95811

A sleep study in a sleep lab with continuous airway pressure is a test for individuals aged 6 and above. It monitors your sleep patterns to check for disorders like sleep apnea. Continuous airway pressure helps keep your airways open while you sleep, improving your breathing.

59 services51 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

57 services47 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

52 services42 patients

Sleep study in sleep lab (6 years or older) 95810

A sleep study in a sleep lab is a non-invasive overnight test that monitors your body while you sleep. It helps doctors understand your sleep patterns and identify any issues like sleep apnea or insomnia. You'll be connected to equipment that tracks your heart rate, brain waves, breathing, and movements.

25 services25 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

19 services16 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

15 services15 patients

Sleep study including heart rate, breathing, airflow, and effort 95806

A sleep study monitors your heart rate, breathing patterns, airflow, and physical effort while you sleep. It helps identify sleep disorders by tracking your sleep stages and cycles. This data aids doctors in diagnosing and treating sleep-related issues.

14 services14 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

14 services14 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

14 services12 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

12 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 99508 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$168.20 typical visit price

range $71.33 – $222.64

Typical copayment $42.05 (range $17.83 – $55.66)

Most-billed visit code 99204

Established Patient

$128.73 typical visit price

range $21.84 – $181.48

Typical copayment $32.18 (range $5.46 – $45.37)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

87.09/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

77.43

Promoting Interoperability

100

Improvement Activities

Cost

62.86

Referred Medical Equipment & Supplies CMS DME claims 16

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Tubing with integrated heating element for use with positive airway pressure device A4604