Provider Profile
Melissa J. Williams, APRN, CNP
Unclaimed ProfileAbout Melissa Williams
Melissa J. Williams, APRN, CNP is a nurse practitioner based in Chicago, IL. Melissa is also listed as specializing in registered nurse and nurse practitioner — family. According to Medicare claims data, Melissa cared for 226 Medicare patients across 260 services. The services billed most often include telephone medical discussion with physician, 11-20 minutes, established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, and established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (312) 695-9121
- Email not available
Practice Locations
676 N SAINT CLAIR ST STE 800
Chicago, IL 60611
Procedures Most Often Billed to Medicare
260 services · 226 patients · 9 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Telephone medical discussion with physician, 11-20 minutes | Office visit | 99442 |
89 | More than most peers in Nurse Practitioner |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
44 | As often as other peers in Nurse Practitioner |
| Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more | Office visit | 99212 |
30 | As often as other peers in Nurse Practitioner |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
21 | |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
19 | As often as other peers in Nurse Practitioner |
| Telephone medical discussion with physician, 21-30 minutes | Office visit | 99443 |
17 | |
| Telephone medical discussion with physician, 5-10 minutes | Office visit | 99441 |
16 | |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
12 | |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
12 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other nurse practitioners at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 24 related providers in 3 groups
Other nurse practitioners in Chicago 8
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2021 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Melissa J. Williams, APRN specialize in?
Melissa J. Williams, APRN is a nurse practitioner in Chicago, IL. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Melissa J. Williams, APRN located?
Melissa J. Williams, APRN is listed at 676 N Saint Clair St Ste 800, Chicago, IL 60611. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Melissa J. Williams, APRN's phone number?
The number on file is (312) 695-9121. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Melissa J. Williams, APRN's NPI number?
Melissa J. Williams, APRN's National Provider Identifier is 1881337822. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Melissa J. Williams, APRN train?
Melissa J. Williams, APRN attended Other, graduating in 2021. This comes from the CMS National Downloadable File.
CMS public data
How long has Melissa J. Williams, APRN been practicing?
Melissa J. Williams, APRN has 5 years experience. Calculated from a graduation year of 2021, reported in the CMS National Downloadable File.
CMS public data
What does Melissa J. Williams, APRN do most often?
According to Medicare billing data, Melissa J. Williams, APRN the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Melissa J. Williams, APRN confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Melissa J. Williams, APRN. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.