Crystal Marcum, APRN
NPI 1639573041 · Family Nurse Practitioner · Shawnee, OK
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Crystal Marcum, APRN is a Family Nurse Practitioner provider in Shawnee, OK (NPI 1639573041).
Provider details
- NPI number
- 1639573041
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APRN
- Sex
- Female
- Sole proprietor
- No
- License
- 114855 (OK)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
11 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,113 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 206 | $8 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 193 | $10 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 135 | $13 |
| Blood Test, Thyroid Stimulating Hormone (tsh)84443 | 124 | $16 |
| Manual Urinalysis Test With Examination Using Microscope, Automated81001 | 120 | $3 |
| Hemoglobin A1c Level83036 | 114 | $10 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 57 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 234 | 33 |
| Levothyroxine Sodiumbrand: Synthroid | 214 | 25 |
| Amlodipine Besylate | 149 | 25 |
| Rosuvastatin Calcium | 140 | 21 |
| Lisinopril | 131 | 23 |
| Semaglutidebrand: Ozempic | 130 | 16 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2014-10-14
- Last updated
- 2019-06-26
Frequently asked questions
- What is Crystal Marcum's NPI number?
- Crystal Marcum's National Provider Identifier (NPI) is 1639573041, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Crystal Marcum's specialty?
- Crystal Marcum is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Crystal Marcum located?
- Crystal Marcum's practice location on file with NPPES is 781 Grand Casino Blvd, Shawnee, OK 74804-1005.
- What is Crystal Marcum's phone number?
- The practice phone number listed in the NPPES registry for Crystal Marcum is (405) 964-5770.
- Does Crystal Marcum accept Medicare?
- Crystal Marcum is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Crystal Marcum's NPI active?
- Yes — Crystal Marcum's NPI (1639573041) is active in the NPPES registry as of the last update on 2019-06-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.