Cynthia Kay Mackey, D.O.
Hospice and Palliative Medicine (Emergency Medicine) Physician · Lancaster, CA
Cynthia Kay Mackey, D.O. is a hospice and palliative medicine (emergency medicine) physician with a practice address in Lancaster, California, and NPI 1598966053, issued on May 30, 2007. Check the license (California 20A6571, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Cynthia Kay Mackey
- Credential
- D.O.
- Primary taxonomy
- Hospice and Palliative Medicine (Emergency Medicine) Physician 207PH0002X
- License number
- 20A6571 CA
Self-reported in NPPES; status is on the state search - Practice location
- 43112 15TH St W, Lancaster, CA 93534
- Phone
- (661) 726-2435
- Enumerated
- May 30, 2007
- Record last updated
- Oct 24, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (661) 726-2301
- Entity
- Type 1 · individual
8 nearest hospice and palliative medicine (emergency medicine) physician records → All 30 in California → Look up another NPI →
Also registered at 43112 15TH St W
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Hoda Haydari Ahwazi, MDFamily Medicine Physician1952980336
- Sifrido AlvarengaRegistered Respiratory Therapist1033687405
- Vardan Babayan, PHARMD.Ambulatory Care Pharmacist1215486287
- Julia Backs, CPNP-PCNurse Practitioner1184091290
Verify Cynthia Kay Mackey in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A6571Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
7.0 times the Medicare Part D claims of the average hospice and palliative medicine (emergency medicine) physician in 2024
1,354 Medicare Part D claims for 682 beneficiaries, against an average of 194 among the 130 providers of this specialty who prescribed in Part D. 245 claims were for opioids.
Most prescribed
- Tramadol Hcl191 claims
- Doxycycline Monohydrate103 claims
- Meloxicam97 claims
- Prednisone89 claims
- Ondansetron Odt79 claims
- Lactulose75 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Cynthia Kay Mackey among 30 hospice and palliative medicine (emergency medicine) physician records in California
Cynthia Kay Mackey, D.O. is one of 30 hospice and palliative medicine (emergency medicine) physician records with a practice address in California. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 30% of them.
- NPI issued2007 · 30% of these records are older, 53% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2017 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207PH0002X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospice and Palliative Medicine (Emergency Medicine) Physician providers in California
There are 30 hospice and palliative medicine (emergency medicine) physician records in California.
All 30 in California → Every provider in Lancaster → Hospice and Palliative Medicine (Emergency Medicine) Physician nationwide →
The 8 hospice and palliative medicine (emergency medicine) physician records with the nearest ZIP codes
- Larry Foreman, D.O.San Luis Obispo, CA 934011669416319
- Christina Matts, MDVentura, CA 930031063403590
- Brandon Perkovich, MD, MBASunnyvale, CA 940861780172288
- Maya Nolan, MDSan Francisco, CA 941431407433584
- Isabel Obrien, MD, MPHSan Francisco, CA 941431386387488
- Robert Mueller, MDSan Mateo, CA 944021104864396
- Fredric Gough, MDFairfield, CA 945331689897019
- Megan Swan, M.D.Fremont, CA 945381194913251
Common questions
What is Cynthia Kay Mackey, D.O.'s NPI number?
Cynthia Kay Mackey, D.O.'s National Provider Identifier (NPI) is 1598966053, issued on May 30, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Cynthia Kay Mackey, D.O. located?
The NPPES record lists a practice address at 43112 15TH St W, Lancaster, CA, 93534. Phone: (661) 726-2435. Providers update this record themselves, so call before visiting.
How can I verify Cynthia Kay Mackey, D.O.'s license?
NPPES lists California license number 20A6571, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Cynthia Kay Mackey, D.O. prescribe under Medicare Part D?
In 2024, Cynthia Kay Mackey, D.O. had 1,354 Medicare Part D claims for 682 beneficiaries; the average among hospice and palliative medicine (emergency medicine) physician prescribers was 194. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.