Dr. David D. Nacionales, DO

Dr. Nacionales practices at PIH Health Whittier Hospital in Whittier, California, part of PIH Health.

Dr. Nacionales' NPI, 1699169227, was assigned on March 20, 2015. Dr. Nacionales graduated from WesternU College of Osteopathic Medicine of the Pacific in 2015. Dr. Nacionales holds California license 20A15651.

Dr. Nacionales' primary practice is PIH Health Whittier Hospital, at 12401 Washington Blvd, Whittier, CA 90602 in Los Angeles County. The practice phone is (562) 698-0811.

Dr. Nacionales' primary practice is PIH Health Whittier Hospital in Whittier, California, part of PIH Health. Dr. Nacionales is also affiliated with PIH Health Good Samaritan Hospital. The medical group on file is Thrive Neurology. Dmand AI also links Dr. Nacionales to 4 more hospitals, 4 medical groups and 2 group practices and clinics, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nacionales practices, 8 sites in all. Vendor and product names are available with a free account.

Neurology is Dr. Nacionales' primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dr. Nacionales is board certified in neurology by the American Board of Psychiatry and Neurology. Dmand AI has Dr. Nacionales' licenses on file in 2 states: California and North Carolina.

Dmand AI lists alzheimer's disease, carpal tunnel syndrome, epilepsy, fibromyalgia and chronic pain, head injury, hereditary polyneuropathy, lower back pain and migraine and chronic headache among the conditions Dr. Nacionales treats.

CMS data shows 410 Medicare services from Dr. Nacionales across 11 procedure codes in 2024, for 291 Medicare patients. Medicare paid $39,012 for them.

CMS counts 291 Medicare patients who saw Dr. Nacionales in 2024. The largest group is 65 to 74, with 105 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 66% are also on Medicaid. Their average risk score is 2.78, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Nacionales' median patient age at 63, with 57% women.

In 2024, Dr. Nacionales wrote 1,113 Medicare Part D claims for 155 patients. 77% of them were for generic drugs. CMS names the drug for 895 of them, across 31 drugs with 11 or more claims each, at $466,528 in total drug cost. In 2023, CMS named 808 claims across 25 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 86 out of 100 for Dr. Nacionales for performance year 2024, reported as part of a group. Dr. Nacionales accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Nacionales as offering telehealth.

Skin biopsy: 1 to 10 procedures (CMS shows small counts as a range)

Dmand AI links 3 papers to Dr. Nacionales, published from 2018 to 2020. Dr. Nacionales' most frequent co-authors are Glenn Mark Fischberg, MD, Brian Fiani, DO and Eldad J. Hadar, MD.

CMS Open Payments shows 284 general payments to Dr. Nacionales from 36 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 76% of the total. LivaNova USA, Inc. paid the most, $3,642.

Dr. Nacionales graduated from WesternU College of Osteopathic Medicine of the Pacific in 2015.

Dr. Nacionales is in network with 17 carriers, including Aetna, Elevance and Excellus BlueCross BlueShield. Medicare plans come from the most carriers, 11. Check the plan with the practice before a visit.