1. In the Colorado Access data, visits with a provider type code of PCP (PC) or obstetrics and gynecology (OB) were classified as primary care. Also, provider type codes of professional (PR) and specialty codes of internal medicine (IM), family practice (FP), obstetrics and gynecology (OB), and general medicine (GP) were considered primary care. Nonphysician visits. If provider type from the NPI data was available;internal medicine (15), obstetrics and gynecology (53)
2. The podiatrist-patient relationship
3. 221700000X-229N00000X); speech/hearing (231H00000X-237700000X); and other clinic or health center;respiratory, developmental, occupational, and rehabilitation therapies
4. audiologist (19), nonphysician practitioner (24, 25), speech therapist (27), and occupational therapist (28) were used. In the Colorado Access data, provider type codes of podiatrist (PD), vision provider (VP), and ancillary providers (AC) with a specialty of physical therapy (PT) or audiology (AU) were categorized as nonphysician visits. Specialist visits. If provider type from the NPI data was available, then specialist visits were classified using the following taxonomy codes: phlebology (202K00000X); neuromusculoskeletal and sports medicine (204C00000X, 204D00000X); oral and maxillofacial surgery (204E00000X); transplant surgery (204F00000X); allergy and immunology (207K00000X-207KI0005X); anesthesiology (207L00000X-207LP3000X); dermatology (207N00000X-207NS0135X); emergency medicine (207P00000X-207PT0002X);internal medicine with a specialty in allergy and immunology (207RA0201X, 207RI0001X), bariatric medicine (207RB0002X), cardiovascular disease (207RC0000X), clinical cardiac electrophysiology (207RC0001X), critical care medicine (207RC0200X), endocrinology, diabetes, and metabolism (207RE0101X), gastroenterology (207RG0100X), hematology (207RH0000X, 207RH0003X), hospice and palliative medicine (207RH0002X), hepatology (207RI0008X, 207RT0003X), interventional cardiology (207RI0011X), infectious disease (207RI0200X), MRI (207RM1200X), nephrology (207RN0300X), pulmonary disease (207RP1001X), rheumatology (207RR0500X), sports medicine (207RS0010X), sleep medicine (207RS0012X), or oncology (207RX0202X); medical genetics