Physician Profile
Nathan C. Grunwald, MD
Unclaimed ProfileAbout Dr. Grunwald
Based in Menasha, WI, Nathan C. Grunwald, MD is listed in the NPI registry under family medicine. Nathan graduated from Medical College of Wisconsin in 2003. Medicare claims data shows Nathan provided 1,235 services to 845 patients. The services billed most often include insertion of needle into vein for collection of blood sample, established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, and blood test, basic group of blood chemicals (calcium, total).
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
- (920) 832-8500
- Email not available
Practice Locations
2005 MIDWAY RD
Menasha, WI 54952
Conditions Commonly Evaluated or Treated
Within Family Medicine generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Allergies
- Diabetes
- Flu
- Hypothyroidism
- Strep throat
- UTI
Cardiometabolic
- High blood pressure
- High cholesterol
Digestive
- Acid reflux
- IBS
Genitourinary and reproductive
- Erectile dysfunction
- Heavy periods
Musculoskeletal and pain
- Gout
- Heel pain
Neurologic and behavioral
- ADHD
- Anxiety
- Depression
- Insomnia
- Migraines
Respiratory and infectious
- Acute bronchitis
- Asthma
- Sinus infection
Skin
- Acne
- Eczema
Common childhood and ear conditions
- Ear infection
- Pink eye
Pain & Joints
- Arthritis
- Back pain
Procedures & services
Most searched procedures
- Annual physical
- Blood test
- Flu shot
- Medicare wellness visit
- Sick visit
- TB test
- Well-woman exam
Preventive interventions
- Birth control counseling
- Smoking cessation counseling
Screening and testing
- Cholesterol screening
- Depression screening
- Diabetes and prediabetes screening
- EKG
Diagnostic Tests
- COVID-19 testing
- Rapid Strep and Flu Swabs
- Urine Drug Screen
Exams & Screenings
- Camp and School Physical
- Pre-Op Clearance Exam
Foot and Leg Pain
- Toenail Fungus Treatment
Heart & Circulation
- Blood Pressure Check
Injections
- Immunotherapy
- Vitamin B12 Injections
Lungs & Breathing
- Pulmonary function test
Minor Procedures
- Burn and Wound Care
- Ingrown toenail removal
- Suture removal
Occupational Health
- DOT Physical
Office procedures
- Earwax removal
- Incision and drainage of an abscess
- Superficial foreign-body removal
Pain Management
- Joint injections
Preventive Care
- Chronic Illness Checkup
- Routine Vaccines
- Travel Vaccines And Consult
Respiratory
- Breathing Treatment
Senior Care
- Cognitive Assessment
Sexual & Reproductive Health
- STD Swabs and Screening
Skin Procedures
- Cyst Removal
- Precancerous Sun Spot Freezing
- Skin Tag Removal
- Wart Removal
Sleep Health
- At-Home Sleep Study Order
Urgent Care Procedures
- Stitches and Laceration Repair
Wellness & Weight
- Weight Management Consult
Women's Health
- Hormone Replacement Therapy Consultation
Procedures Most Often Billed to Medicare
1,235 services · 845 patients · 19 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
249 | More often than most peers in Family Medicine |
| Screening mammography | Imaging | 77067 |
18 | |
| Screening 3d breast mammography | Imaging | 77063 |
16 | |
| Influenza vaccine split virus, preservative free | Treatment | 90662 |
22 | |
| Sarscov2 vac 50 mcg/0.5ml im | Treatment | 91322 |
20 | As often as other peers in Family Medicine |
| Admn sarscov2 vacc 1 dose | Treatment | 90480 |
20 | As often as other peers in Family Medicine |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
218 | More often than most peers in Family Medicine |
| Blood test, basic group of blood chemicals (calcium, total) | Lab test | 80048 |
149 | More often than most peers in Family Medicine |
| Blood test, lipids (cholesterol and triglycerides) | Lab test | 80061 |
145 | As often as other peers in Family Medicine |
| Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | Billing code | G0439 |
80 | As often as other peers in Family Medicine |
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 family doctors at this location 8
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 6
Clinically related specialties at the same address — the people this provider most likely works alongside.
Other family doctors in Menasha 3
Same specialty, same city.
More connections — 23 related providers in 3 groups
Trained at Medical College of Wisconsin 8
Other providers in the same specialty who trained at the same institution.
Class of 2003 at Medical College of Wisconsin 7
Providers who graduated from the same medical school in the same year.
Also performs Insertion of needle into vein for collection of blood sample 8
Providers in WI who bill this service to Medicare most often.
Common questions
What does Dr. Grunwald specialize in?
Dr. Grunwald is a family doctor in Menasha, WI. That is the designation recorded for this NPI in the federal registry, where it is listed as “Family Medicine”.
NPI registry
Where is Dr. Grunwald located?
Dr. Grunwald is listed at 2005 Midway Rd, Menasha, WI 54952. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Grunwald's phone number?
The number on file is (920) 832-8500. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Grunwald?
Dr. Grunwald's National Provider Identifier is 1073549887. 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. Grunwald go to medical school?
Dr. Grunwald attended Medical College of Wisconsin, graduating in 2003. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Grunwald have?
Dr. Grunwald has 23 years experience. Calculated from a graduation year of 2003, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Grunwald do most often?
According to Medicare billing data, Dr. Grunwald performs procedures including insertion of needle into vein for collection of blood sample; reads or performs imaging such as screening mammography and screening 3d breast mammography; provides treatments such as influenza vaccine split virus, preservative free and sarscov2 vac 50 mcg/0.5ml im, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Grunwald's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Grunwald. 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.