Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Lillian Christine Mack, APRN

Individual provider Primary Care Nurse Practitioner · NPI 1275296055

Lillian Christine Mack, APRN is a Nurse Practitioner in Orlando, Florida. Qualified in 2017, 9 years ago. Practices with Spencer J Hardenbrook MD PC, a 93-clinician group and accepts Medicare assignment. Licensed in Florida.

Years since qualifying
9
Licensed in
FL
In the registry since
2021
What do these letters mean?
APRN — Advanced Practice Registered Nurse
The umbrella licence covering nurse practitioners, midwives, anaesthetists and clinical nurse specialists.

See every abbreviation used in this directory →

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Practice location Address checks out

1426 Willow Branch Dr
Orlando, FL 32828-7457
Phone: (386) 216-9223
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Primary Care Nurse Practitioner (primary) Taxonomy 363LP2300X · Licence 11015887 (FL)

Record details

NPI number1275296055
Entity typeIndividual (Type 1)
GenderFemale
Credentials APRN
Sole proprietorNo
NPI enumeratedOctober 18, 2021
Last updated in NPPESOctober 18, 2021
Certification dateOctober 18, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2017 (9 years in practice)
Group practice Spencer J Hardenbrook Md Pc — 93 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients142
Services billed 1,192 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Spencer J Hardenbrook MD PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 93 clinicians in the practice; 12 are shown here.

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