Physician Profile
William R Grier, M.D
Unclaimed ProfileAbout Dr. Grier
William R Grier, M.D is a healthcare provider in Baltimore, MD specializing in critical care (intensivists). William trained at Drexel University College of Medicine, graduating in 2016. William is also listed as specializing in internal medicine. According to Medicare claims data, William cared for 585 Medicare patients across 671 services.
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
Source: NPPES NPI Registry
Contact Information
- (410) 328-6110
- Email not available
Practice Locations
22 S GREENE ST ROOM N3E09
Baltimore, MD 21201
Procedures Most Often Billed to Medicare
671 services · 585 patients · 15 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Test to examine how well the lungs exchange gases | Treatment | 94729 |
117 |
| Test to determine lung volumes using sensors | Treatment | 94726 |
116 |
| Test to measure expiratory airflow and volume | Treatment | 94010 |
104 |
| Test to measure expiratory airflow and volume changes before and after medication administration | Treatment | 94060 |
53 |
| Test for exercise-induced lung stress | Treatment | 94618 |
24 |
| Test to examine how well the lungs exchange gases | Treatment | 94729 |
18 |
| Test to determine lung volumes using sensors | Treatment | 94726 |
18 |
| Test to measure expiratory airflow and volume | Treatment | 94010 |
16 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
69 |
| Critical care, first 30-74 minutes | Office visit | 99291 |
45 |
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.
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.
Other critical cares in Baltimore 8
Same specialty, same city.
Trained at Drexel University College of Medicine 8
Other providers in the same specialty who trained at the same institution.
More connections — 16 related providers in 2 groups
Class of 2016 at Drexel University College of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Test to examine how well the lungs exchange gases 8
Providers in MD who bill this service to Medicare most often.
Common questions
What does Dr. Grier specialize in?
Dr. Grier is a critical care (intensivists) in Baltimore, MD. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “CRITICAL CARE (INTENSIVISTS)”.
NPI registry
Where is Dr. Grier located?
Dr. Grier is listed at 22 S GREENE ST ROOM N3E09, Baltimore, MD 21201. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Grier's phone number?
The number on file is (410) 328-6110. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Grier's NPI number?
Dr. Grier's National Provider Identifier is 1740643378. 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 Dr. Grier go to medical school?
Dr. Grier attended Drexel University College of Medicine, graduating in 2016. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Grier been practicing?
Dr. Grier has 10 years experience. Calculated from a graduation year of 2016, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Grier do most often?
According to Medicare billing data, Dr. Grier provides treatments such as test to examine how well the lungs exchange gases and test to determine lung volumes using sensors, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Grier confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Grier. 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.